{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "nimbusbci-nimbus-mcp",
  "component": "nimbus-mcp-2",
  "generated_at": "2026-10-24T15:18:10.397Z",
  "tracking_since": "2026-10-05",
  "counts": {
    "critical": 0,
    "security": 34,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a15c7b-b2ca-78ea-a481-03cc85cb4405",
      "kind": "check.unverifiable",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.verified",
      "to_code": "transport.auth_gated",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-10-21",
      "occurred_at": "2026-10-21 03:22:52.91354+00",
      "observed_since": "2026-10-20",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15c7b-b2ca-78ea-a481-03cc85cb4405"
    },
    {
      "id": "chg_01a15c7b-b2b8-7976-915f-d7653aa83ec8",
      "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": "2026-10-21",
      "occurred_at": "2026-10-21 03:22:52.91354+00",
      "observed_since": "2026-10-20",
      "source": "scan",
      "summary": "Stability (fail → unverified)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15c7b-b2b8-7976-915f-d7653aa83ec8"
    },
    {
      "id": "chg_01a15c7b-b2d2-78bb-910e-276e00d3ec30",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "auth_gated",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "auth_gated",
        "from": "verified"
      },
      "occurred_on": "2026-10-21",
      "occurred_at": "2026-10-21 03:22:52.91354+00",
      "observed_since": "2026-10-20",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → behind authorisation)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15c7b-b2d2-78bb-910e-276e00d3ec30"
    },
    {
      "id": "chg_01a15c7b-b2cf-7a01-9c22-f3b2ef1ba0b7",
      "kind": "check.appeared",
      "family": "auth-registration",
      "subject_kind": "check",
      "subject": "auth-registration",
      "subject_child": "",
      "from_code": null,
      "to_code": "auth.registration_dcr_only",
      "from_value": null,
      "to_value": "partial",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-21",
      "occurred_at": "2026-10-21 03:22:52.91354+00",
      "observed_since": "2026-10-20",
      "source": "scan",
      "summary": "First check of Authorization (partial)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15c7b-b2cf-7a01-9c22-f3b2ef1ba0b7"
    },
    {
      "id": "chg_01a15c7b-b2cc-7acb-87f9-e4b75583ed59",
      "kind": "check.verdict",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_destructive",
      "to_code": "auth.rfc9728",
      "from_value": "fail",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-21",
      "occurred_at": "2026-10-21 03:22:52.91354+00",
      "observed_since": "2026-10-20",
      "source": "scan",
      "summary": "Authorization (fail → pass)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15c7b-b2cc-7acb-87f9-e4b75583ed59"
    },
    {
      "id": "chg_01a15c7b-b2c9-7ca3-86a9-25ae2725ad72",
      "kind": "check.unverifiable",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.injection_clean",
      "to_code": "toolsafety.auth_gated",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-21",
      "occurred_at": "2026-10-21 03:22:52.91354+00",
      "observed_since": "2026-10-20",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15c7b-b2c9-7ca3-86a9-25ae2725ad72"
    },
    {
      "id": "chg_01a15758-0d88-7d42-a269-0a4bc6d3be3c",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "stats.grouped",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "stats.grouped"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “stats.grouped” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d88-7d42-a269-0a4bc6d3be3c"
    },
    {
      "id": "chg_01a15758-0d88-7054-96a8-08eef3cfe302",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "project.save",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "project.save"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “project.save” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d88-7054-96a8-08eef3cfe302"
    },
    {
      "id": "chg_01a15758-0d87-7581-8621-366e328ef0a7",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "leaderboard.submit",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "leaderboard.submit"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “leaderboard.submit” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d87-7581-8621-366e328ef0a7"
    },
    {
      "id": "chg_01a15758-0d87-7151-a9fb-9715ed732f60",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "foundation.compare",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "foundation.compare"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “foundation.compare” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d87-7151-a9fb-9715ed732f60"
    },
    {
      "id": "chg_01a15758-0d86-7ba2-8655-bddce0feee85",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "experiment.run",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "experiment.run"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “experiment.run” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d86-7ba2-8655-bddce0feee85"
    },
    {
      "id": "chg_01a15758-0d86-76e0-bdd9-1069ecd3f6b2",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "experiment.get",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "experiment.get"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “experiment.get” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d86-76e0-bdd9-1069ecd3f6b2"
    },
    {
      "id": "chg_01a15758-0d86-71e5-90f0-dbf70e8e323c",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "data.upload",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "data.upload"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “data.upload” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d86-71e5-90f0-dbf70e8e323c"
    },
    {
      "id": "chg_01a15758-0d85-7b8d-b09d-864e0fccf69f",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "account.whoami",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "account.whoami"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Tool “account.whoami” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d85-7b8d-b09d-864e0fccf69f"
    },
    {
      "id": "chg_01a15758-0d84-7af0-bc11-b818bfeec77f",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.churn",
      "from_value": "0.47",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "15",
        "added": "28",
        "breaks": "1",
        "removed": "0",
        "auth_transport": "0"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "Stability (0.47 → fail)",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d84-7af0-bc11-b818bfeec77f"
    },
    {
      "id": "chg_01a15758-0d8a-72f0-a1dc-d4b169fbb51c",
      "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": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d8a-72f0-a1dc-d4b169fbb51c"
    },
    {
      "id": "chg_01a15758-0d89-7883-a8fe-f64ef2ca713f",
      "kind": "tool.added",
      "family": "",
      "subject_kind": "tool",
      "subject": "data.delete_upload",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "data.delete_upload",
        "destructive": "true"
      },
      "occurred_on": "2026-10-20",
      "occurred_at": "2026-10-20 03:25:50.79059+00",
      "observed_since": "2026-10-19",
      "source": "scan",
      "summary": "New tool “data.delete_upload”, which the server declares destructive",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a15758-0d89-7883-a8fe-f64ef2ca713f"
    },
    {
      "id": "chg_01a14f51-1b92-7c78-a171-ff4f5349c049",
      "kind": "tool.added",
      "family": "",
      "subject_kind": "tool",
      "subject": "project.delete",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "project.delete",
        "destructive": "true"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 14:01:17.854997+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "New tool “project.delete”, which the server declares destructive",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14f51-1b92-7c78-a171-ff4f5349c049"
    },
    {
      "id": "chg_01a14f51-1b91-7b56-a539-47d5b2fba463",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "stats.grouped",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "stats.grouped"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 14:01:17.854997+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "Tool “stats.grouped” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14f51-1b91-7b56-a539-47d5b2fba463"
    },
    {
      "id": "chg_01a14f51-1b90-713d-8aa1-8203a33f9550",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "pipeline.validate_node",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "pipeline.validate_node"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 14:01:17.854997+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "Tool “pipeline.validate_node” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14f51-1b90-713d-8aa1-8203a33f9550"
    },
    {
      "id": "chg_01a14f51-1b8f-7140-8458-1b0f432e3803",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "execution.run",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "execution.run"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 14:01:17.854997+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "Tool “execution.run” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14f51-1b8f-7140-8458-1b0f432e3803"
    },
    {
      "id": "chg_01a14f51-1b8d-7c2c-b41c-3dd967401fe9",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "catalog.leaderboard",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "catalog.leaderboard"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 14:01:17.854997+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "Tool “catalog.leaderboard” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14f51-1b8d-7c2c-b41c-3dd967401fe9"
    },
    {
      "id": "chg_01a14d0b-ee96-7a28-aba6-f718cfbe59d4",
      "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 03:26:29.975615+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/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14d0b-ee96-7a28-aba6-f718cfbe59d4"
    },
    {
      "id": "chg_01a14d0b-ee91-726d-b4c2-a26e9422a984",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "calibration.train",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "calibration.train"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 03:26:29.975615+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "Tool “calibration.train” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a14d0b-ee91-726d-b4c2-a26e9422a984"
    },
    {
      "id": "chg_01a144d3-38c5-77a4-9d76-f4a2ea45eaf4",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "protocol.export_stats",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "protocol.export_stats"
      },
      "occurred_on": "2026-10-16",
      "occurred_at": "2026-10-16 13:07:35.675112+00",
      "observed_since": "2026-10-16",
      "source": "scan",
      "summary": "Tool “protocol.export_stats” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a144d3-38c5-77a4-9d76-f4a2ea45eaf4"
    },
    {
      "id": "chg_01a142c3-fc1f-7f0a-9cf3-7c3938390aa4",
      "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": "2026-10-16",
      "occurred_at": "2026-10-16 03:31:41.934118+00",
      "observed_since": "2026-10-15",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a142c3-fc1f-7f0a-9cf3-7c3938390aa4"
    },
    {
      "id": "chg_01a13b5f-06e0-7033-b646-12f7ff43606d",
      "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 17:04:03.340336+00",
      "observed_since": "2026-10-14",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a13b5f-06e0-7033-b646-12f7ff43606d"
    },
    {
      "id": "chg_01a13b5f-060f-74b4-baa0-cc853e444bfa",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "catalog.leaderboard",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "catalog.leaderboard"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 17:04:03.340336+00",
      "observed_since": "2026-10-14",
      "source": "scan",
      "summary": "Tool “catalog.leaderboard” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a13b5f-060f-74b4-baa0-cc853e444bfa"
    },
    {
      "id": "chg_01a136db-5f34-7ce1-b729-abc3accebfd9",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "leaderboard.submit",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "leaderboard.submit"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 20:01:48.754025+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “leaderboard.submit” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a136db-5f34-7ce1-b729-abc3accebfd9"
    },
    {
      "id": "chg_01a136db-5f36-7959-97e4-00d943b1a0e6",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "plots.leaderboard",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "plots.leaderboard"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 20:01:48.754025+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “plots.leaderboard” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a136db-5f36-7959-97e4-00d943b1a0e6"
    },
    {
      "id": "chg_01a12ce9-2f37-7b3b-af2c-9bd42bf36ffd",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "catalog.leaderboard",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "catalog.leaderboard"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 21:40:41.875899+00",
      "observed_since": "2026-10-07",
      "source": "scan",
      "summary": "Tool “catalog.leaderboard” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a12ce9-2f37-7b3b-af2c-9bd42bf36ffd"
    },
    {
      "id": "chg_01a12ce9-2f3b-7bdf-bade-23ab7ebbd174",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "stream.telemetry",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "stream.telemetry"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 21:40:41.875899+00",
      "observed_since": "2026-10-07",
      "source": "scan",
      "summary": "Tool “stream.telemetry” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a12ce9-2f3b-7bdf-bade-23ab7ebbd174"
    },
    {
      "id": "chg_01a12ce9-2f41-77c5-b9e0-f25d1467a986",
      "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": "2026-10-11",
      "occurred_at": "2026-10-11 21:40:41.875899+00",
      "observed_since": "2026-10-07",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a12ce9-2f41-77c5-b9e0-f25d1467a986"
    },
    {
      "id": "chg_01a11443-0502-7a09-988e-b1331a8adc70",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "calibration.start",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "calibration.start"
      },
      "occurred_on": "2026-10-07",
      "occurred_at": "2026-10-07 02:48:11.835954+00",
      "observed_since": "2026-10-06",
      "source": "scan",
      "summary": "Tool “calibration.start” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/nimbusbci-nimbus-mcp/nimbus-mcp-2#chg-chg_01a11443-0502-7a09-988e-b1331a8adc70"
    }
  ],
  "days": [
    {
      "date": "2026-10-21",
      "total": 36,
      "delta": -34,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 9
    },
    {
      "date": "2026-10-20",
      "total": 70,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 16
    },
    {
      "date": "2026-10-18",
      "total": 70,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 20
    },
    {
      "date": "2026-10-17",
      "total": 70,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 37,
        "to": 40,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 11,
          "to_days": 12
        },
        "partial": false,
        "compared_to": "2026-10-16",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-16",
      "total": 69,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 28
    },
    {
      "date": "2026-10-15",
      "total": 69,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 30,
        "to": 33,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 9,
          "to_days": 10
        },
        "partial": false,
        "compared_to": "2026-10-14",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-14",
      "total": 68,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 5
    },
    {
      "date": "2026-10-13",
      "total": 68,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 5
    }
  ]
}