{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "com-materialscodegraph-mcg",
  "component": "api",
  "generated_at": "2026-10-24T05:14:13.683Z",
  "tracking_since": "2026-09-19",
  "counts": {
    "critical": 0,
    "security": 12,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a1680e-3e03-7c80-b0e8-a2e4fe9c2b49",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_catalog",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_catalog"
      },
      "occurred_on": "2026-10-23",
      "occurred_at": "2026-10-23 09:18:46.250506+00",
      "observed_since": "2026-10-22",
      "source": "scan",
      "summary": "Tool “mcg_catalog” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a1680e-3e03-7c80-b0e8-a2e4fe9c2b49"
    },
    {
      "id": "chg_01a1680e-3e05-75f0-82e1-3540003a4125",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_fetch_artifacts",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_fetch_artifacts"
      },
      "occurred_on": "2026-10-23",
      "occurred_at": "2026-10-23 09:18:46.250506+00",
      "observed_since": "2026-10-22",
      "source": "scan",
      "summary": "Tool “mcg_fetch_artifacts” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a1680e-3e05-75f0-82e1-3540003a4125"
    },
    {
      "id": "chg_01a1680e-3e05-7e04-afce-4675be5dfcd8",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_get_artifact",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_get_artifact"
      },
      "occurred_on": "2026-10-23",
      "occurred_at": "2026-10-23 09:18:46.250506+00",
      "observed_since": "2026-10-22",
      "source": "scan",
      "summary": "Tool “mcg_get_artifact” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a1680e-3e05-7e04-afce-4675be5dfcd8"
    },
    {
      "id": "chg_01a15371-b636-7199-abad-370dcbf78134",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_catalog",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_catalog"
      },
      "occurred_on": "2026-10-19",
      "occurred_at": "2026-10-19 09:15:23.54844+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "Tool “mcg_catalog” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a15371-b636-7199-abad-370dcbf78134"
    },
    {
      "id": "chg_01a15371-b637-714d-b66e-3e59352d33d2",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_quote",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_quote"
      },
      "occurred_on": "2026-10-19",
      "occurred_at": "2026-10-19 09:15:23.54844+00",
      "observed_since": "2026-10-18",
      "source": "scan",
      "summary": "Tool “mcg_quote” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a15371-b637-714d-b66e-3e59352d33d2"
    },
    {
      "id": "chg_01a14e4d-b0ba-72f5-b99e-b13858601df4",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_catalog",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_catalog"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 09:17:55.79087+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "Tool “mcg_catalog” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a14e4d-b0ba-72f5-b99e-b13858601df4"
    },
    {
      "id": "chg_01a14e4d-b112-7454-88b6-c6d6af6167de",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_quote",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_quote"
      },
      "occurred_on": "2026-10-18",
      "occurred_at": "2026-10-18 09:17:55.79087+00",
      "observed_since": "2026-10-17",
      "source": "scan",
      "summary": "Tool “mcg_quote” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a14e4d-b112-7454-88b6-c6d6af6167de"
    },
    {
      "id": "chg_01a139b3-cbc3-70d7-bfc6-1f76d6edff3b",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "mcg_get_run",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "mcg_get_run"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 09:17:25.439911+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “mcg_get_run” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a139b3-cbc3-70d7-bfc6-1f76d6edff3b"
    },
    {
      "id": "chg_01a125f8-e87b-7851-9096-d13060c98fd8",
      "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": "2026-10-10",
      "occurred_at": "2026-10-10 13:20:31.734061+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a125f8-e87b-7851-9096-d13060c98fd8"
    },
    {
      "id": "chg_01a125f8-e881-7180-95ea-34301373d14a",
      "kind": "check.reverified",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.auth_gated",
      "to_code": "toolsafety.injection_clean",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 13:20:31.734061+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a125f8-e881-7180-95ea-34301373d14a"
    },
    {
      "id": "chg_01a125f8-e882-75c3-8e16-045e002173a3",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.challenge_only",
      "to_code": "auth.challenge_only_invoke",
      "from_value": "fail",
      "to_value": "fail",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 13:20:31.734061+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "Authorization (Authorisation is enforced on tool calls, but the challenge carries no valid RFC 9728 metadata, so a client cannot discover where to get a token.)",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a125f8-e882-75c3-8e16-045e002173a3"
    },
    {
      "id": "chg_01a125f8-e883-7041-b4a8-8bcb3ac64715",
      "kind": "check.appeared",
      "family": "tool-safety-manipulation",
      "subject_kind": "check",
      "subject": "tool-safety-manipulation",
      "subject_child": "",
      "from_code": null,
      "to_code": "toolsafety.manipulation_clean",
      "from_value": null,
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "units": "13",
        "judged": "13"
      },
      "occurred_on": "2026-10-10",
      "occurred_at": "2026-10-10 13:20:31.734061+00",
      "observed_since": "2026-10-04",
      "source": "scan",
      "summary": "First check of Judged manipulation (pass)",
      "link": "https://verifymcp.io/servers/com-materialscodegraph-mcg/api#chg-chg_01a125f8-e883-7041-b4a8-8bcb3ac64715"
    }
  ],
  "days": [
    {
      "date": "2026-10-23",
      "total": 73,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 3
    },
    {
      "date": "2026-10-22",
      "total": 73,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 43,
        "to": 47,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 13,
          "to_days": 14
        },
        "partial": false,
        "compared_to": "2026-10-21",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-20",
      "total": 72,
      "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": "2026-10-19",
        "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": "2026-10-19",
      "total": 71,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-10-18",
      "total": 71,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 5
    },
    {
      "date": "2026-10-17",
      "total": 71,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 27,
        "to": 30,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 8,
          "to_days": 9
        },
        "partial": false,
        "compared_to": "2026-10-16",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-16",
      "total": 70,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-10-15",
      "total": 70,
      "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": "2026-10-14",
        "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
    }
  ]
}