{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "io-datadef-mcp",
  "component": "datadef",
  "generated_at": "2026-09-20T18:03:35.834Z",
  "tracking_since": "2026-08-05",
  "counts": {
    "critical": 0,
    "security": 11,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0a2cf-208c-7f15-b8d6-2dc568e4efce",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.stable",
      "from_value": "0.97",
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-15",
      "occurred_at": "2026-09-15 02:04:38.334196+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Stability (0.97 → pass)",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a0a2cf-208c-7f15-b8d6-2dc568e4efce"
    },
    {
      "id": "chg_01a02733-9252-7731-af83-ef21a410c1fb",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "canvas_add_nodes",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "canvas_add_nodes"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “canvas_add_nodes” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9252-7731-af83-ef21a410c1fb"
    },
    {
      "id": "chg_01a02733-9253-78d7-b9f0-919d13f71f69",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "canvas_describe_canvas",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "canvas_describe_canvas"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “canvas_describe_canvas” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9253-78d7-b9f0-919d13f71f69"
    },
    {
      "id": "chg_01a02733-9254-7067-bb1d-50eb131e1c96",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "canvas_group_nodes",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "canvas_group_nodes"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “canvas_group_nodes” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9254-7067-bb1d-50eb131e1c96"
    },
    {
      "id": "chg_01a02733-9254-7597-897f-1e406c70ef74",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "create_blank_diagram",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "create_blank_diagram"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “create_blank_diagram” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9254-7597-897f-1e406c70ef74"
    },
    {
      "id": "chg_01a02733-9254-79c8-8faa-f080944bd987",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "create_diagram",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "create_diagram"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “create_diagram” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9254-79c8-8faa-f080944bd987"
    },
    {
      "id": "chg_01a02733-9255-7896-9a16-a138d463842c",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "edit_diagram",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "edit_diagram"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “edit_diagram” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9255-7896-9a16-a138d463842c"
    },
    {
      "id": "chg_01a02733-9255-7e6a-86fa-ab09ac1d3712",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "export_diagram",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "export_diagram"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “export_diagram” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9255-7e6a-86fa-ab09ac1d3712"
    },
    {
      "id": "chg_01a02733-9256-7492-919c-a3341c645b14",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "get_design_guide",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "get_design_guide"
      },
      "occurred_on": "2026-08-22",
      "occurred_at": "2026-08-22 02:01:26.257483+00",
      "observed_since": "2026-08-21",
      "source": "scan",
      "summary": "Tool “get_design_guide” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a02733-9256-7492-919c-a3341c645b14"
    },
    {
      "id": "chg_01a0084d-29b1-76ac-ab7c-57f18d37c2f8",
      "kind": "check.reverified",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.auth_gated",
      "to_code": "transport.verified",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-08-16",
      "occurred_at": "2026-08-16 02:01:09.756197+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a0084d-29b1-76ac-ab7c-57f18d37c2f8"
    },
    {
      "id": "chg_01a0084d-29b3-7b5e-9c4d-9ac670d4887a",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728",
      "to_code": "auth.rfc9728_invoke",
      "from_value": "pass",
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-16",
      "occurred_at": "2026-08-16 02:01:09.756197+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "Authorization (Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token.)",
      "link": "https://verifymcp.io/servers/io-datadef-mcp/datadef#chg-chg_01a0084d-29b3-7b5e-9c4d-9ac670d4887a"
    }
  ],
  "days": [
    {
      "date": "2026-09-15",
      "total": 92,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-14",
      "total": 92,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 93,
        "to": 97,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 28,
          "to_days": 29
        },
        "partial": false,
        "compared_to": "2026-09-13",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-11",
      "total": 91,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 83,
        "to": 87,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 25,
          "to_days": 26
        },
        "partial": false,
        "compared_to": "2026-09-10",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-09",
      "total": 90,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 77,
        "to": 80,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 23,
          "to_days": 24
        },
        "partial": false,
        "compared_to": "2026-09-08",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-07",
      "total": 89,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 70,
        "to": 73,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 21,
          "to_days": 22
        },
        "partial": false,
        "compared_to": "2026-09-06",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-05",
      "total": 88,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 63,
        "to": 67,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 19,
          "to_days": 20
        },
        "partial": false,
        "compared_to": "2026-09-04",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-03",
      "total": 87,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 57,
        "to": 60,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 17,
          "to_days": 18
        },
        "partial": false,
        "compared_to": "2026-09-02",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-01",
      "total": 86,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 50,
        "to": 53,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 15,
          "to_days": 16
        },
        "partial": false,
        "compared_to": "2026-08-31",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    }
  ]
}