{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "app-shelfclub-books",
  "component": "mcp",
  "generated_at": "2026-10-18T15:59:08.556Z",
  "tracking_since": "2026-10-10",
  "counts": {
    "critical": 0,
    "security": 12,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a137f5-5666-7a8a-afb6-c1a8081b1958",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_books_by_mood",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "find_books_by_mood"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 01:09:45.348385+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “find_books_by_mood” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a137f5-5666-7a8a-afb6-c1a8081b1958"
    },
    {
      "id": "chg_01a137f5-56ca-7a4f-8ed2-e29ee77bca85",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_author",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_author"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 01:09:45.348385+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “get_author” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a137f5-56ca-7a4f-8ed2-e29ee77bca85"
    },
    {
      "id": "chg_01a137f5-5727-73c4-baa0-e8cd34921d4e",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_book",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_book"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 01:09:45.348385+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “get_book” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a137f5-5727-73c4-baa0-e8cd34921d4e"
    },
    {
      "id": "chg_01a137f5-5859-794b-b146-7a956c6c018c",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_similar_books",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_similar_books"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 01:09:45.348385+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “get_similar_books” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a137f5-5859-794b-b146-7a956c6c018c"
    },
    {
      "id": "chg_01a137f5-58c0-78bf-8638-acae3a6b6876",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_trending_books",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_trending_books"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 01:09:45.348385+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “get_trending_books” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a137f5-58c0-78bf-8638-acae3a6b6876"
    },
    {
      "id": "chg_01a137f5-5928-7c50-a6b2-4604c8e62bf9",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "search_books",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "search_books"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 01:09:45.348385+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “search_books” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a137f5-5928-7c50-a6b2-4604c8e62bf9"
    },
    {
      "id": "chg_01a12d24-29e1-7a54-a2ee-b3b0495bc107",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "find_books_by_mood",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "find_books_by_mood"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 22:45:07.150555+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Tool “find_books_by_mood” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a12d24-29e1-7a54-a2ee-b3b0495bc107"
    },
    {
      "id": "chg_01a12d24-29e2-745f-8922-21298fd60efe",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_author",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_author"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 22:45:07.150555+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Tool “get_author” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a12d24-29e2-745f-8922-21298fd60efe"
    },
    {
      "id": "chg_01a12d24-29e2-7914-b51e-b7dd936fc7e4",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_book",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_book"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 22:45:07.150555+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Tool “get_book” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a12d24-29e2-7914-b51e-b7dd936fc7e4"
    },
    {
      "id": "chg_01a12d24-29e2-7ddf-a77a-81a910a05cb8",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_similar_books",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_similar_books"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 22:45:07.150555+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Tool “get_similar_books” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a12d24-29e2-7ddf-a77a-81a910a05cb8"
    },
    {
      "id": "chg_01a12d24-29e3-74a2-8f67-fd50c59dd55d",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_trending_books",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_trending_books"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 22:45:07.150555+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Tool “get_trending_books” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a12d24-29e3-74a2-8f67-fd50c59dd55d"
    },
    {
      "id": "chg_01a12d24-29e3-7981-b2c8-3c3d0fcdb76e",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "search_books",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "search_books"
      },
      "occurred_on": "2026-10-11",
      "occurred_at": "2026-10-11 22:45:07.150555+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Tool “search_books” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/app-shelfclub-books/mcp#chg-chg_01a12d24-29e3-7981-b2c8-3c3d0fcdb76e"
    }
  ],
  "days": [
    {
      "date": "2026-10-17",
      "total": 74,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 20,
        "to": 23,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 6,
          "to_days": 7
        },
        "partial": false,
        "compared_to": "2026-10-16",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-15",
      "total": 73,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 13,
        "to": 17,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 4,
          "to_days": 5
        },
        "partial": false,
        "compared_to": "2026-10-14",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-14",
      "total": 72,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 9
    },
    {
      "date": "2026-10-12",
      "total": 72,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 3,
        "to": 7,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 1,
          "to_days": 2
        },
        "partial": false,
        "compared_to": "2026-10-11",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-11",
      "total": 71,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 8
    },
    {
      "date": "2026-10-10",
      "total": 71,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 0
    }
  ]
}