{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "hey-research-lab-hey-research",
  "component": "mcp-research",
  "generated_at": "2026-10-24T08:01:44.681Z",
  "tracking_since": "2026-10-10",
  "counts": {
    "critical": 0,
    "security": 17,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a167c9-7c88-73a2-a185-e24fc6c8d5e9",
      "kind": "tool.description_changed",
      "family": "",
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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 08:03:40.254694+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/mcp-research#chg-chg_01a167c9-7c88-73a2-a185-e24fc6c8d5e9"
    },
    {
      "id": "chg_01a15857-01f8-73d4-ab00-28be93b211af",
      "kind": "tool.description_changed",
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      "detail": {
        "tool": "explain_fact"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 08:04:19.556251+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/mcp-research#chg-chg_01a15857-01f8-73d4-ab00-28be93b211af"
    },
    {
      "id": "chg_01a14e0c-44a9-708d-800f-25f830551780",
      "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": "2026-10-18",
      "occurred_at": "2026-10-18 08:06:24.609049+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/mcp-research#chg-chg_01a14e0c-44a9-708d-800f-25f830551780"
    },
    {
      "id": "chg_01a14e0c-4516-7490-a1f2-2a8a93a2d6a6",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
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      "from_code": null,
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      "from_value": null,
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      "materiality": "security",
      "direction": "neutral",
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      "detail": {},
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 08:06:24.609049+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/mcp-research#chg-chg_01a14e0c-4516-7490-a1f2-2a8a93a2d6a6"
    },
    {
      "id": "chg_01a143bd-f061-7ecc-92cd-6d78fa2f0b18",
      "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",
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      "detail": {
        "tool": "get_evidence"
      },
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 08:04:41.831435+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/mcp-research#chg-chg_01a143bd-f061-7ecc-92cd-6d78fa2f0b18"
    },
    {
      "id": "chg_01a143bd-f05e-7688-bf84-b907ec47e85d",
      "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": "2026-10-16",
      "occurred_at": "2026-10-16 08:04:41.831435+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/mcp-research#chg-chg_01a143bd-f05e-7688-bf84-b907ec47e85d"
    },
    {
      "id": "chg_01a13970-6d3f-781a-9e76-7d5fd5af0421",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "research_answer",
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      "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 08:03:50.646073+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/mcp-research#chg-chg_01a13970-6d3f-781a-9e76-7d5fd5af0421"
    },
    {
      "id": "chg_01a13970-6da3-74a3-8f6f-9bf839dcfa01",
      "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 08:03:50.646073+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/mcp-research#chg-chg_01a13970-6da3-74a3-8f6f-9bf839dcfa01"
    },
    {
      "id": "chg_01a13449-4037-78d9-ae1f-dddff49d5398",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-4037-78d9-ae1f-dddff49d5398"
    },
    {
      "id": "chg_01a13449-4035-7b23-8357-2fb7414bd95f",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-4035-7b23-8357-2fb7414bd95f"
    },
    {
      "id": "chg_01a13449-403c-7227-9211-aa4371125973",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-403c-7227-9211-aa4371125973"
    },
    {
      "id": "chg_01a13449-403a-701e-9eb3-95a84864abc7",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-403a-701e-9eb3-95a84864abc7"
    },
    {
      "id": "chg_01a13449-403a-7779-83eb-62960fc6ad17",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-403a-7779-83eb-62960fc6ad17"
    },
    {
      "id": "chg_01a13449-403b-7636-99cc-5b78e480eb29",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-403b-7636-99cc-5b78e480eb29"
    },
    {
      "id": "chg_01a13449-403b-79fa-931b-2f4af290fdc4",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-403b-79fa-931b-2f4af290fdc4"
    },
    {
      "id": "chg_01a13449-4039-7770-9319-e0691e69bb32",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-4039-7770-9319-e0691e69bb32"
    },
    {
      "id": "chg_01a13449-4038-7e38-9df3-13cbfb35d8df",
      "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 08:02:58.204771+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/mcp-research#chg-chg_01a13449-4038-7e38-9df3-13cbfb35d8df"
    }
  ],
  "days": [
    {
      "date": "2026-10-23",
      "total": 80,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-10-22",
      "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": {
          "code": "stability.building_history",
          "from_days": 16,
          "to_days": 17
        },
        "partial": false,
        "compared_to": "2026-10-21",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-20",
      "total": 79,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-10-18",
      "total": 78,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-10-17",
      "total": 77,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-10-16",
      "total": 77,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 3
    },
    {
      "date": "2026-10-14",
      "total": 76,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 6
    },
    {
      "date": "2026-10-13",
      "total": 76,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 15
    }
  ]
}