{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "io-applayer-tango",
  "component": "tango",
  "generated_at": "2026-09-21T15:05:06.803Z",
  "tracking_since": "2026-07-31",
  "counts": {
    "critical": 0,
    "security": 21,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0c343-1cca-7c3e-b561-3f1f494015fb",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "ask_human",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "ask_human"
      },
      "occurred_on": "2026-09-21",
      "occurred_at": "2026-09-21 09:19:10.083206+00",
      "observed_since": "2026-09-20",
      "source": "scan",
      "summary": "Tool “ask_human” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0c343-1cca-7c3e-b561-3f1f494015fb"
    },
    {
      "id": "chg_01a0c343-1ccc-7375-ad14-403debbc6f1d",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "pause_task",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "pause_task"
      },
      "occurred_on": "2026-09-21",
      "occurred_at": "2026-09-21 09:19:10.083206+00",
      "observed_since": "2026-09-20",
      "source": "scan",
      "summary": "Tool “pause_task” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0c343-1ccc-7375-ad14-403debbc6f1d"
    },
    {
      "id": "chg_01a0c343-1ccc-787d-9b3f-b79ad9c4fbc1",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "request_decomposition",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "request_decomposition"
      },
      "occurred_on": "2026-09-21",
      "occurred_at": "2026-09-21 09:19:10.083206+00",
      "observed_since": "2026-09-20",
      "source": "scan",
      "summary": "Tool “request_decomposition” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0c343-1ccc-787d-9b3f-b79ad9c4fbc1"
    },
    {
      "id": "chg_01a0c343-1cce-757b-a28f-0c5be8ae8d9e",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "send_back_to_creator",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "send_back_to_creator"
      },
      "occurred_on": "2026-09-21",
      "occurred_at": "2026-09-21 09:19:10.083206+00",
      "observed_since": "2026-09-20",
      "source": "scan",
      "summary": "Tool “send_back_to_creator” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0c343-1cce-757b-a28f-0c5be8ae8d9e"
    },
    {
      "id": "chg_01a0c343-1cce-7a7e-8ea7-5c81b975c814",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "set_webhook",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "set_webhook"
      },
      "occurred_on": "2026-09-21",
      "occurred_at": "2026-09-21 09:19:10.083206+00",
      "observed_since": "2026-09-20",
      "source": "scan",
      "summary": "Tool “set_webhook” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0c343-1cce-7a7e-8ea7-5c81b975c814"
    },
    {
      "id": "chg_01a0a983-5c56-7be1-9741-b2d08f52e2fd",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "update_project",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "update_project"
      },
      "occurred_on": "2026-09-16",
      "occurred_at": "2026-09-16 09:19:13.129213+00",
      "observed_since": "2026-09-15",
      "source": "scan",
      "summary": "Tool “update_project” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0a983-5c56-7be1-9741-b2d08f52e2fd"
    },
    {
      "id": "chg_01a094e9-447b-7d58-9f0a-1e470aeb3d30",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "delete_task",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "delete_task"
      },
      "occurred_on": "2026-09-12",
      "occurred_at": "2026-09-12 09:18:30.442333+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Tool “delete_task” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a094e9-447b-7d58-9f0a-1e470aeb3d30"
    },
    {
      "id": "chg_01a094e9-447e-7ee3-bd36-ef8df0796eeb",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "list_my_tasks",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "list_my_tasks"
      },
      "occurred_on": "2026-09-12",
      "occurred_at": "2026-09-12 09:18:30.442333+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Tool “list_my_tasks” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a094e9-447e-7ee3-bd36-ef8df0796eeb"
    },
    {
      "id": "chg_01a094e9-447f-7c2d-80c4-045603091530",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "pull_next_task",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "pull_next_task"
      },
      "occurred_on": "2026-09-12",
      "occurred_at": "2026-09-12 09:18:30.442333+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Tool “pull_next_task” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a094e9-447f-7c2d-80c4-045603091530"
    },
    {
      "id": "chg_01a051f2-491a-78d6-bea9-daaf69824f7c",
      "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": "2026-08-30",
      "occurred_at": "2026-08-30 09:13:47.786988+00",
      "observed_since": "2026-08-29",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a051f2-491a-78d6-bea9-daaf69824f7c"
    },
    {
      "id": "chg_01a051f2-491d-77e8-9e17-160cf6e155a1",
      "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": "2026-08-30",
      "occurred_at": "2026-08-30 09:13:47.786988+00",
      "observed_since": "2026-08-29",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a051f2-491d-77e8-9e17-160cf6e155a1"
    },
    {
      "id": "chg_01a051f2-491d-7d04-b8c8-d952bd45c934",
      "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": "82",
        "judged": "82"
      },
      "occurred_on": "2026-08-30",
      "occurred_at": "2026-08-30 09:13:47.786988+00",
      "observed_since": "2026-08-29",
      "source": "scan",
      "summary": "First check of Judged manipulation (pass)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a051f2-491d-7d04-b8c8-d952bd45c934"
    },
    {
      "id": "chg_01a051f2-491e-71e0-8fa7-bc79c3deea7c",
      "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": "2026-08-30",
      "occurred_at": "2026-08-30 09:13:47.786988+00",
      "observed_since": "2026-08-29",
      "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-applayer-tango/tango#chg-chg_01a051f2-491e-71e0-8fa7-bc79c3deea7c"
    },
    {
      "id": "chg_01a0239b-6b01-76b1-99c3-215ea7f5afaa",
      "kind": "check.unverifiable",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.unreachable",
      "to_code": "transport.auth_gated",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-08-21",
      "occurred_at": "2026-08-21 09:16:22.970223+00",
      "observed_since": "2026-08-20",
      "source": "scan",
      "summary": "Transport (fail → unverified)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0239b-6b01-76b1-99c3-215ea7f5afaa"
    },
    {
      "id": "chg_01a0239b-6b03-770d-add2-c3478edf6cdc",
      "kind": "check.reverified",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.unreachable",
      "to_code": "auth.rfc9728",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-21",
      "occurred_at": "2026-08-21 09:16:22.970223+00",
      "observed_since": "2026-08-20",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0239b-6b03-770d-add2-c3478edf6cdc"
    },
    {
      "id": "chg_01a0239b-6b04-707d-9ec5-fcfd225a71c4",
      "kind": "check.reverified",
      "family": "tls",
      "subject_kind": "check",
      "subject": "tls",
      "subject_child": "",
      "from_code": "tls.unreachable",
      "to_code": "tls.valid",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-21",
      "occurred_at": "2026-08-21 09:16:22.970223+00",
      "observed_since": "2026-08-20",
      "source": "scan",
      "summary": "TLS certificate (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0239b-6b04-707d-9ec5-fcfd225a71c4"
    },
    {
      "id": "chg_01a0239b-6b04-7a58-bfa7-ad123c4b46f7",
      "kind": "check.reverified",
      "family": "hsts",
      "subject_kind": "check",
      "subject": "hsts",
      "subject_child": "",
      "from_code": "headers.inconclusive",
      "to_code": "headers.hsts_present",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-21",
      "occurred_at": "2026-08-21 09:16:22.970223+00",
      "observed_since": "2026-08-20",
      "source": "scan",
      "summary": "HSTS header (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a0239b-6b04-7a58-bfa7-ad123c4b46f7"
    },
    {
      "id": "chg_01a01425-0c92-7230-a7f5-39874da1bd9b",
      "kind": "check.reverified",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.auth_gated",
      "to_code": "transport.unreachable",
      "from_value": "unverified",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-08-18",
      "occurred_at": "2026-08-18 09:12:47.428544+00",
      "observed_since": "2026-08-17",
      "source": "scan",
      "summary": "Transport (unverified → fail)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a01425-0c92-7230-a7f5-39874da1bd9b"
    },
    {
      "id": "chg_01a01425-0c93-7b7f-a14f-47ab7c9a6208",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728",
      "to_code": "auth.unreachable",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-18",
      "occurred_at": "2026-08-18 09:12:47.428544+00",
      "observed_since": "2026-08-17",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a01425-0c93-7b7f-a14f-47ab7c9a6208"
    },
    {
      "id": "chg_01a01425-0c94-717c-950d-7c76432b6727",
      "kind": "check.unverifiable",
      "family": "tls",
      "subject_kind": "check",
      "subject": "tls",
      "subject_child": "",
      "from_code": "tls.valid",
      "to_code": "tls.unreachable",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-18",
      "occurred_at": "2026-08-18 09:12:47.428544+00",
      "observed_since": "2026-08-17",
      "source": "scan",
      "summary": "TLS certificate (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a01425-0c94-717c-950d-7c76432b6727"
    },
    {
      "id": "chg_01a01425-0c94-7c67-9304-3e9096e6a0fa",
      "kind": "check.unverifiable",
      "family": "hsts",
      "subject_kind": "check",
      "subject": "hsts",
      "subject_child": "",
      "from_code": "headers.hsts_present",
      "to_code": "headers.inconclusive",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-18",
      "occurred_at": "2026-08-18 09:12:47.428544+00",
      "observed_since": "2026-08-17",
      "source": "scan",
      "summary": "HSTS header (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-applayer-tango/tango#chg-chg_01a01425-0c94-7c67-9304-3e9096e6a0fa"
    }
  ],
  "days": [
    {
      "date": "2026-09-21",
      "total": 86,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-09-19",
      "total": 85,
      "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": "2026-09-18",
        "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": "2026-09-17",
      "total": 84,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-09-16",
      "total": 84,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 11
    },
    {
      "date": "2026-09-14",
      "total": 83,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 47,
        "to": 50,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 14,
          "to_days": 15
        },
        "partial": false,
        "compared_to": "2026-09-13",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-12",
      "total": 82,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 8
    },
    {
      "date": "2026-09-10",
      "total": 81,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 33,
        "to": 37,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 10,
          "to_days": 11
        },
        "partial": false,
        "compared_to": "2026-09-09",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-07",
      "total": 80,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 23,
        "to": 27,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 7,
          "to_days": 8
        },
        "partial": false,
        "compared_to": "2026-09-06",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    }
  ]
}