{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "hey-research-lab-hey-research",
  "component": "heyresearch",
  "generated_at": "2026-10-24T07:07:11.143Z",
  "tracking_since": "2026-09-28",
  "counts": {
    "critical": 0,
    "security": 66,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a1662a-5720-799e-98f6-cf6d23403e7b",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "research_answer",
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      "from_code": null,
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      "materiality": "security",
      "direction": "neutral",
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      "detail": {
        "tool": "research_answer"
      },
      "occurred_on": "2026-10-23",
      "occurred_at": "2026-10-23 00:30:13.25348+00",
      "observed_since": "2026-10-22",
      "source": "scan",
      "summary": "Tool “research_answer” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1662a-5720-799e-98f6-cf6d23403e7b"
    },
    {
      "id": "chg_01a156b6-cd48-7872-899d-fc977b89be2b",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "explain_fact",
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      "from_code": null,
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      "materiality": "security",
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      "detail": {
        "tool": "explain_fact"
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      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 00:29:43.085611+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “explain_fact” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a156b6-cd48-7872-899d-fc977b89be2b"
    },
    {
      "id": "chg_01a156b6-cd49-7e67-8746-2fdeb141ceea",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_projects",
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      "from_code": null,
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      "from_value": null,
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      "materiality": "security",
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      "detail": {
        "tool": "find_projects"
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      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 00:29:43.085611+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “find_projects” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a156b6-cd49-7e67-8746-2fdeb141ceea"
    },
    {
      "id": "chg_01a14c6a-1844-7f07-a5f7-e62cb65a005a",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "research_answer",
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      "from_code": null,
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      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "research_answer"
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      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 00:29:43.850301+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "Tool “research_answer” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14c6a-1844-7f07-a5f7-e62cb65a005a"
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    {
      "id": "chg_01a14c6a-1844-78b5-853d-edc0806aa461",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_projects",
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      "from_code": null,
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      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "find_projects"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 00:29:43.850301+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "Tool “find_projects” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14c6a-1844-78b5-853d-edc0806aa461"
    },
    {
      "id": "chg_01a14c6a-1843-7761-9836-01bf4bb62721",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "chain_overview",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "chain_overview"
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      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 00:29:43.850301+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "Tool “chain_overview” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14c6a-1843-7761-9836-01bf4bb62721"
    },
    {
      "id": "chg_01a14c6a-1845-748c-aeb3-e5ed2ac18d82",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 00:29:43.850301+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14c6a-1845-748c-aeb3-e5ed2ac18d82"
    },
    {
      "id": "chg_01a14741-d55a-7562-8072-80cbdf174534",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "chain_overview",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
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      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "chain_overview"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool “chain_overview” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d55a-7562-8072-80cbdf174534"
    },
    {
      "id": "chg_01a14741-d55c-7063-8750-2ff2d3950e43",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_token_market",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_token_market"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool “get_token_market” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d55c-7063-8750-2ff2d3950e43"
    },
    {
      "id": "chg_01a14741-d55b-76aa-9c81-f197d7501373",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_project_snapshot",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_project_snapshot"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool “get_project_snapshot” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d55b-76aa-9c81-f197d7501373"
    },
    {
      "id": "chg_01a14741-d55b-72e5-9292-ab5915123f6f",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_evidence",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_evidence"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool “get_evidence” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d55b-72e5-9292-ab5915123f6f"
    },
    {
      "id": "chg_01a14741-d55a-7d29-9074-c850c42591d5",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_changes",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_changes"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool “get_changes” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d55a-7d29-9074-c850c42591d5"
    },
    {
      "id": "chg_01a14741-d556-7249-80fa-15db1bd871bd",
      "kind": "check.reverified",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.insufficient_history",
      "to_code": "stability.churn",
      "from_value": "unverified",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "19",
        "added": "2",
        "breaks": "0",
        "removed": "3",
        "auth_transport": "0"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-16",
      "source": "scan",
      "summary": "Stability (unverified → fail)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d556-7249-80fa-15db1bd871bd"
    },
    {
      "id": "chg_01a14741-d557-7182-9200-fc11409e784c",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.unreachable",
      "to_code": "transport.verified",
      "from_value": "fail",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-16",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d557-7182-9200-fc11409e784c"
    },
    {
      "id": "chg_01a14741-d557-77a5-a7b0-52af6cf3aa82",
      "kind": "check.reverified",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.unreachable",
      "to_code": "auth.none_no_destructive",
      "from_value": "unverified",
      "to_value": "partial",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-16",
      "source": "scan",
      "summary": "Authorization (unverified → partial)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d557-77a5-a7b0-52af6cf3aa82"
    },
    {
      "id": "chg_01a14741-d557-7c21-bf3a-4d3be75f4012",
      "kind": "check.reverified",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.unreachable",
      "to_code": "toolsafety.injection_clean",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-16",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d557-7c21-bf3a-4d3be75f4012"
    },
    {
      "id": "chg_01a14741-d558-7d00-aee6-d9bf77cafa61",
      "kind": "check.reverified",
      "family": "hsts",
      "subject_kind": "check",
      "subject": "hsts",
      "subject_child": "",
      "from_code": "headers.inconclusive",
      "to_code": "headers.hsts_present",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-16",
      "source": "scan",
      "summary": "HSTS header (unverified → pass)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d558-7d00-aee6-d9bf77cafa61"
    },
    {
      "id": "chg_01a14741-d55a-7955-a37d-5fa5246721a4",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_projects",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "find_projects"
      },
      "occurred_on": "2026-10-17",
      "occurred_at": "2026-10-17 00:27:39.193192+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool “find_projects” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a14741-d55a-7955-a37d-5fa5246721a4"
    },
    {
      "id": "chg_01a1422b-0719-7d84-b296-a30746bafded",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.verified",
      "to_code": "transport.unreachable",
      "from_value": "pass",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 00:44:36.237226+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1422b-0719-7d84-b296-a30746bafded"
    },
    {
      "id": "chg_01a1422b-077d-7d14-85fc-2b37b7e43e98",
      "kind": "check.unverifiable",
      "family": "hsts",
      "subject_kind": "check",
      "subject": "hsts",
      "subject_child": "",
      "from_code": "headers.hsts_present",
      "to_code": "headers.inconclusive",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 00:44:36.237226+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "HSTS header (pass → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1422b-077d-7d14-85fc-2b37b7e43e98"
    },
    {
      "id": "chg_01a1422b-06b5-7322-8f72-1363d49404b6",
      "kind": "check.unverifiable",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.injection_clean",
      "to_code": "toolsafety.unreachable",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 00:44:36.237226+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1422b-06b5-7322-8f72-1363d49404b6"
    },
    {
      "id": "chg_01a1422b-0650-7437-8fab-6b0c2fe039e8",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_no_destructive",
      "to_code": "auth.unreachable",
      "from_value": "partial",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 00:44:36.237226+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Authorization (partial → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1422b-0650-7437-8fab-6b0c2fe039e8"
    },
    {
      "id": "chg_01a1422b-063c-78a7-a351-8847c28f67ca",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.churn",
      "to_code": "stability.insufficient_history",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 00:44:36.237226+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Stability (fail → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1422b-063c-78a7-a351-8847c28f67ca"
    },
    {
      "id": "chg_01a1422b-07de-7574-8676-e67fa5d2f139",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "verified"
      },
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 00:44:36.237226+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a1422b-07de-7574-8676-e67fa5d2f139"
    },
    {
      "id": "chg_01a137da-2765-76dc-a7e2-699561da3a5a",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "research_answer",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "research_answer"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 00:40:04.135176+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “research_answer” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a137da-2765-76dc-a7e2-699561da3a5a"
    },
    {
      "id": "chg_01a137da-2889-71e8-b020-058ccdeb22b3",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 00:40:04.135176+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a137da-2889-71e8-b020-058ccdeb22b3"
    },
    {
      "id": "chg_01a132a6-2094-7d8b-9ead-5c1fdc13eeff",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "research_answer",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "research_answer"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “research_answer” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2094-7d8b-9ead-5c1fdc13eeff"
    },
    {
      "id": "chg_01a132a6-2092-7078-9109-cdcaec2638d0",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_project_snapshot",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_project_snapshot"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_project_snapshot” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2092-7078-9109-cdcaec2638d0"
    },
    {
      "id": "chg_01a132a6-2092-76c7-88d8-22e6e8e452dd",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_project_timeline",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_project_timeline"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_project_timeline” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2092-76c7-88d8-22e6e8e452dd"
    },
    {
      "id": "chg_01a132a6-208c-74fd-89b6-39842a0fa028",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "ask_hey",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "ask_hey"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “ask_hey” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-208c-74fd-89b6-39842a0fa028"
    },
    {
      "id": "chg_01a132a6-208d-74d3-83c2-977be38e9962",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "chain_overview",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "chain_overview"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “chain_overview” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-208d-74d3-83c2-977be38e9962"
    },
    {
      "id": "chg_01a132a6-208d-7d67-97ab-53e2282a76bc",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "explain_fact",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "explain_fact"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “explain_fact” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-208d-7d67-97ab-53e2282a76bc"
    },
    {
      "id": "chg_01a132a6-208e-7351-b2e9-8578ddb60f47",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_projects",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "find_projects"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “find_projects” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-208e-7351-b2e9-8578ddb60f47"
    },
    {
      "id": "chg_01a132a6-208e-7ece-bd25-cb78c5d331ea",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_changes",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_changes"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_changes” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-208e-7ece-bd25-cb78c5d331ea"
    },
    {
      "id": "chg_01a132a6-208f-7d4d-947b-e940b5382260",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_contract",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_contract"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_contract” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-208f-7d4d-947b-e940b5382260"
    },
    {
      "id": "chg_01a132a6-2091-7aa9-8095-c705e3a2a923",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_evidence",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_evidence"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_evidence” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2091-7aa9-8095-c705e3a2a923"
    },
    {
      "id": "chg_01a132a6-2093-7850-b618-94238d806447",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_token_market",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_token_market"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_token_market” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2093-7850-b618-94238d806447"
    },
    {
      "id": "chg_01a132a6-2093-7ce2-8a52-6e41fcb8a060",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_v4_hook",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_v4_hook"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “get_v4_hook” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2093-7ce2-8a52-6e41fcb8a060"
    },
    {
      "id": "chg_01a132a6-2094-731b-b4e3-ff175db54f19",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "market_integrity",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "market_integrity"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “market_integrity” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2094-731b-b4e3-ff175db54f19"
    },
    {
      "id": "chg_01a132a6-2094-77be-9dca-4a98ca8d3b07",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "project_diff",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "project_diff"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Tool “project_diff” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2094-77be-9dca-4a98ca8d3b07"
    },
    {
      "id": "chg_01a132a6-2096-75a6-b791-9ecca4b1956c",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 00:25:10.508945+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a132a6-2096-75a6-b791-9ecca4b1956c"
    },
    {
      "id": "chg_01a125d6-81b6-75ca-9caa-047b6453e385",
      "kind": "check.reverified",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.insufficient_history",
      "to_code": "stability.churn",
      "from_value": "unverified",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "12",
        "added": "1",
        "breaks": "0",
        "removed": "3",
        "auth_transport": "0"
      },
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 12:42:57.088799+00",
      "observed_since": "2026-10-05",
      "source": "scan",
      "summary": "Stability (unverified → fail)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a125d6-81b6-75ca-9caa-047b6453e385"
    },
    {
      "id": "chg_01a125d6-81b8-7282-b7ea-1b3eef1ea720",
      "kind": "check.reverified",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_unlisted",
      "to_code": "auth.none_no_destructive",
      "from_value": "unverified",
      "to_value": "partial",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 12:42:57.088799+00",
      "observed_since": "2026-10-05",
      "source": "scan",
      "summary": "Authorization (unverified → partial)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a125d6-81b8-7282-b7ea-1b3eef1ea720"
    },
    {
      "id": "chg_01a125d6-81b9-707a-b698-087c3892bc6a",
      "kind": "check.reverified",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.unreachable",
      "to_code": "toolsafety.injection_clean",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 12:42:57.088799+00",
      "observed_since": "2026-10-05",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a125d6-81b9-707a-b698-087c3892bc6a"
    },
    {
      "id": "chg_01a125d6-81bd-7ed1-ab22-bc233679f734",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 12:42:57.088799+00",
      "observed_since": "2026-10-08",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a125d6-81bd-7ed1-ab22-bc233679f734"
    },
    {
      "id": "chg_01a109a8-cbee-7261-a87d-44d7f45eb9d0",
      "kind": "check.unverifiable",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.injection_clean",
      "to_code": "toolsafety.unreachable",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-05",
      "occurred_at": "2026-10-05 01:23:32.23448+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a109a8-cbee-7261-a87d-44d7f45eb9d0"
    },
    {
      "id": "chg_01a109a8-cbfc-707e-823f-d3d173c5a4a4",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_no_destructive",
      "to_code": "auth.none_unlisted",
      "from_value": "partial",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-05",
      "occurred_at": "2026-10-05 01:23:32.23448+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Authorization (partial → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a109a8-cbfc-707e-823f-d3d173c5a4a4"
    },
    {
      "id": "chg_01a109a8-cc5a-731c-9f65-0fd02016d7c5",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "verified"
      },
      "occurred_on": "2026-10-05",
      "occurred_at": "2026-10-05 01:23:32.23448+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a109a8-cc5a-731c-9f65-0fd02016d7c5"
    },
    {
      "id": "chg_01a109a8-cb99-78da-b148-31bcb7c1d1ac",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.churn",
      "to_code": "stability.insufficient_history",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-05",
      "occurred_at": "2026-10-05 01:23:32.23448+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Stability (fail → unverified)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a109a8-cb99-78da-b148-31bcb7c1d1ac"
    },
    {
      "id": "chg_01a10446-035b-7aaa-b67d-0f11462ab4b1",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-04",
      "occurred_at": "2026-10-04 00:17:39.645609+00",
      "observed_since": "2026-10-03",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a10446-035b-7aaa-b67d-0f11462ab4b1"
    },
    {
      "id": "chg_01a10446-035a-79c9-a6ae-e85884056dde",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_evidence",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_evidence"
      },
      "occurred_on": "2026-10-04",
      "occurred_at": "2026-10-04 00:17:39.645609+00",
      "observed_since": "2026-10-03",
      "source": "scan",
      "summary": "Tool “get_evidence” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a10446-035a-79c9-a6ae-e85884056dde"
    },
    {
      "id": "chg_01a0f4d5-2b7a-7ad1-859a-f9ad11ff5562",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.churn",
      "from_value": "0.07",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "3",
        "added": "1",
        "breaks": "0",
        "removed": "3",
        "auth_transport": "0"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Stability (0.07 → fail)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b7a-7ad1-859a-f9ad11ff5562"
    },
    {
      "id": "chg_01a0f4d5-2b7e-739b-9413-4d5c56920b71",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_projects",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "find_projects"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “find_projects” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b7e-739b-9413-4d5c56920b71"
    },
    {
      "id": "chg_01a0f4d5-2b7f-7f2d-aa0f-6c478b00a8b8",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_changes",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_changes"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “get_changes” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b7f-7f2d-aa0f-6c478b00a8b8"
    },
    {
      "id": "chg_01a0f4d5-2b80-794d-9f6b-feb3a7b3c831",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_contract",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_contract"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “get_contract” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b80-794d-9f6b-feb3a7b3c831"
    },
    {
      "id": "chg_01a0f4d5-2b81-757e-a39b-b12df1ef8d8a",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_evidence",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_evidence"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “get_evidence” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b81-757e-a39b-b12df1ef8d8a"
    },
    {
      "id": "chg_01a0f4d5-2b81-7b71-b040-76b9d5fd36ac",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_project_coverage",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "get_project_coverage"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “get_project_coverage” was removed",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b81-7b71-b040-76b9d5fd36ac"
    },
    {
      "id": "chg_01a0f4d5-2b82-7870-a46b-9c0db2d9ebba",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_project_snapshot",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_project_snapshot"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “get_project_snapshot” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b82-7870-a46b-9c0db2d9ebba"
    },
    {
      "id": "chg_01a0f4d5-2b83-78d1-bf92-eb3c361ac898",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_token_market",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_token_market"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “get_token_market” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b83-78d1-bf92-eb3c361ac898"
    },
    {
      "id": "chg_01a0f4d5-2b84-7035-9dcb-62ed6df4f372",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "lookup_token",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "lookup_token"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “lookup_token” was removed",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b84-7035-9dcb-62ed6df4f372"
    },
    {
      "id": "chg_01a0f4d5-2b85-7a8d-9a3c-1df61368896a",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "project_diff",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "project_diff"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “project_diff” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b85-7a8d-9a3c-1df61368896a"
    },
    {
      "id": "chg_01a0f4d5-2b86-7673-8c60-c412714a6d65",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b86-7673-8c60-c412714a6d65"
    },
    {
      "id": "chg_01a0f4d5-2b86-7b64-9794-baefb5988798",
      "kind": "server.breaking_without_version_bump",
      "family": "",
      "subject_kind": "server",
      "subject": "0.1.1",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "0.1.1",
      "to_value": "0.1.1",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "removed": "3",
        "version": "0.1.1",
        "breaking": "0"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "A breaking change shipped without a version bump (still 0.1.1)",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b86-7b64-9794-baefb5988798"
    },
    {
      "id": "chg_01a0f4d5-2b7d-72b7-97bb-e3a31baf8cea",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "compare_projects",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "compare_projects"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “compare_projects” was removed",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b7d-72b7-97bb-e3a31baf8cea"
    },
    {
      "id": "chg_01a0f4d5-2b7c-7c5f-b322-5204531374d3",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "chain_overview",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "chain_overview"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “chain_overview” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b7c-7c5f-b322-5204531374d3"
    },
    {
      "id": "chg_01a0f4d5-2b7d-7a3f-b2b4-a72828c5604c",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "explain_fact",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "explain_fact"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 00:20:06.10796+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Tool “explain_fact” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/hey-research-lab-hey-research/heyresearch#chg-chg_01a0f4d5-2b7d-7a3f-b2b4-a72828c5604c"
    }
  ],
  "days": [
    {
      "date": "2026-10-23",
      "total": 81,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-10-21",
      "total": 80,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 53,
        "to": 57,
        "delta": 4,
        "others": [],
        "accrual": null,
        "partial": false,
        "compared_to": "2026-10-20",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 53 to 57."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-20",
      "total": 79,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 3
    },
    {
      "date": "2026-10-18",
      "total": 79,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 4
    },
    {
      "date": "2026-10-17",
      "total": 78,
      "delta": 55,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 16
    },
    {
      "date": "2026-10-16",
      "total": 23,
      "delta": -54,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 9
    },
    {
      "date": "2026-10-14",
      "total": 77,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 5
    },
    {
      "date": "2026-10-13",
      "total": 77,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 22
    }
  ]
}