{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "com-ucpchecker-ucp-checker",
  "component": "ucpchecker",
  "generated_at": "2026-09-25T19:00:57.639Z",
  "tracking_since": "2026-08-25",
  "counts": {
    "critical": 0,
    "security": 14,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0a454-5285-7b24-ba00-338196b01932",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "search-all",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "search-all"
      },
      "occurred_on": "2026-09-15",
      "occurred_at": "2026-09-15 09:09:44.553298+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Tool “search-all” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a0a454-5285-7b24-ba00-338196b01932"
    },
    {
      "id": "chg_01a0a454-5286-7e64-846d-6c36c68e351e",
      "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": "2026-09-15",
      "occurred_at": "2026-09-15 09:09:44.553298+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a0a454-5286-7e64-846d-6c36c68e351e"
    },
    {
      "id": "chg_01a09fcf-01e6-7e7f-b1c5-772916b29920",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "list-categories",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "list-categories"
      },
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 12:05:38.487596+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Tool “list-categories” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a09fcf-01e6-7e7f-b1c5-772916b29920"
    },
    {
      "id": "chg_01a09fcf-01e9-7d38-90c3-678122b1e49a",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "search-all",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "search-all"
      },
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 12:05:38.487596+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Tool “search-all” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a09fcf-01e9-7d38-90c3-678122b1e49a"
    },
    {
      "id": "chg_01a09f2d-c2c3-7a11-9426-c4198583cd79",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "check-domain",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "check-domain"
      },
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 09:09:31.186481+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Tool “check-domain” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a09f2d-c2c3-7a11-9426-c4198583cd79"
    },
    {
      "id": "chg_01a09f2d-c2c4-7170-b07f-fd88332cf185",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "list-stores",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "list-stores"
      },
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 09:09:31.186481+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Tool “list-stores” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a09f2d-c2c4-7170-b07f-fd88332cf185"
    },
    {
      "id": "chg_01a09f2d-c2c5-7595-9cc6-edd673b8478b",
      "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": "2026-09-14",
      "occurred_at": "2026-09-14 09:09:31.186481+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a09f2d-c2c5-7595-9cc6-edd673b8478b"
    },
    {
      "id": "chg_01a06160-3e13-78de-9728-e7ea998b470b",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_destructive",
      "to_code": "auth.none_undeclared",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "auth": "none",
        "undeclared_tools": "8"
      },
      "occurred_on": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Authorization (fail → unverified)",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e13-78de-9728-e7ea998b470b"
    },
    {
      "id": "chg_01a06160-3e15-7962-a409-f4424e1ffda1",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.churn",
      "from_value": "0.23",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "8",
        "added": "0",
        "breaks": "0",
        "removed": "2",
        "auth_transport": "0"
      },
      "occurred_on": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Stability (0.23 → fail)",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e15-7962-a409-f4424e1ffda1"
    },
    {
      "id": "chg_01a06160-3e16-7b0d-9803-55cb7884ccc0",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "add-to-cart",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "add-to-cart"
      },
      "occurred_on": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Tool “add-to-cart” was removed",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e16-7b0d-9803-55cb7884ccc0"
    },
    {
      "id": "chg_01a06160-3e17-70f1-a58d-b7aa44b76c5c",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "build-bundle",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "build-bundle"
      },
      "occurred_on": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Tool “build-bundle” was removed",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e17-70f1-a58d-b7aa44b76c5c"
    },
    {
      "id": "chg_01a06160-3e17-767d-bdc3-aecc7bd91b11",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "check-domain",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "check-domain"
      },
      "occurred_on": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Tool “check-domain” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e17-767d-bdc3-aecc7bd91b11"
    },
    {
      "id": "chg_01a06160-3e17-7c6b-90fb-f65ea5e4fc76",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get-product-details",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get-product-details"
      },
      "occurred_on": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Tool “get-product-details” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e17-7c6b-90fb-f65ea5e4fc76"
    },
    {
      "id": "chg_01a06160-3e19-7791-bb91-966ca0f94893",
      "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": "2026-09-02",
      "occurred_at": "2026-09-02 09:08:12.216171+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/com-ucpchecker-ucp-checker/ucpchecker#chg-chg_01a06160-3e19-7791-bb91-966ca0f94893"
    }
  ],
  "days": [
    {
      "date": "2026-09-25",
      "total": 76,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-24",
      "total": 76,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 77,
        "to": 80,
        "delta": 3,
        "others": [],
        "accrual": null,
        "partial": false,
        "compared_to": "2026-09-23",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 77 to 80."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-22",
      "total": 75,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 70,
        "to": 73,
        "delta": 3,
        "others": [],
        "accrual": null,
        "partial": false,
        "compared_to": "2026-09-21",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 70 to 73."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-20",
      "total": 74,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 63,
        "to": 67,
        "delta": 4,
        "others": [],
        "accrual": null,
        "partial": false,
        "compared_to": "2026-09-19",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 63 to 67."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-17",
      "total": 73,
      "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": "2026-09-16",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 53 to 57."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-16",
      "total": 72,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-09-15",
      "total": 72,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-09-14",
      "total": 71,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 11
    }
  ]
}