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Glama
briandconnelly

codex-in-claude

by briandconnelly
OverviewSchemaSourceRelated ServersScoreDiscussionsAdmin
Python
Local

List server capabilities (free)

codex_capabilities
Read-only

Discover available tools, cost tiers, and the result fingerprint to gauge server capabilities and cache responses without making a model call.

Instructions

List this server's tools, tiers, and the result fingerprint. Free — no model call. Clients can cache by the fingerprint.

detail="summary" (default) returns each tool's name, cost, stability, and error_codes — the facts tools/list does not already carry — plus async_lifecycle, but only for the *_async tools. detail="full" adds use_when/returns/required_params/key_optional_params, restating what you already hold. detail="contracts" omits tool_details.

Pass include_schemas to also embed the full 'error-envelope', 'result-meta', 'capabilities-result', and/or 'status-result' schema, and/or the 'parameter-contracts' document (a contract doc, not a JSON Schema) — a tool-reachable fallback to the codex:// resources for resource-blind clients. It works in any detail mode.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
detailNoWhat to return: 'summary' (default) returns each tool's name, cost, stability, and error_codes; the *_async tools also get async_lifecycle. 'full' adds use_when, returns, and the parameter lists (which tools/list already carries). 'contracts' drops tool_details: fetch a schema, or recheck fingerprint, without re-paying for the inventory.summary
include_schemasNoOpt-in tool-reachable fallback for resource-blind clients: also embed the full 'error-envelope', 'result-meta', 'capabilities-result', and/or 'status-result' schema, and/or the 'parameter-contracts' document (a contract doc, not a JSON Schema, sourced from the codex://params resource body), in the response — the default payload omits them and points at the codex:// resources instead.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okYes

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed1 schema field changedv0.22.0
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "active_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "annotations_reading": {
-        "type": "string"
-      },
-      "deprecation_policy": {
-        "type": "string"
-      },
-      "error_envelope_resource": {
-        "type": "string"
-      },
-      "fingerprint": {
-        "type": "string"
-      },
-      "fingerprint_covers": {
-        "description": "A contract-semantic change in any listed category changes the fingerprint; nothing outside them does. Release identity is excluded: serverInfo.version, version, server_version change every release WITHOUT moving the fingerprint.",
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "free_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "name": {
-        "type": "string"
-      },
-      "negative_scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "ok": {
-        "const": true,
-        "type": "boolean"
-      },
-      "prerequisites": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "protocol_revision": {
-        "type": "string"
-      },
-      "resource_error_carrier": {
-        "type": "string"
-      },
-      "result_meta_resource": {
-        "type": "string"
-      },
-      "sandboxes": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "schemas": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "server_version": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "stability": {
-        "type": "string"
-      },
-      "tiers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "tool_details": {
-        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
-        "type": "array"
-      },
-      "tool_error_carrier": {
-        "type": "string"
-      },
-      "transport": {
-        "type": "string"
-      },
-      "version": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "name",
-      "version",
-      "transport",
-      "stability",
-      "active_tools",
-      "free_tools",
-      "tiers",
-      "sandboxes",
-      "scope",
-      "negative_scope",
-      "prerequisites",
-      "deprecation_policy"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "error": {
-        "description": "Populated error envelope; full schema at resource codex://error-envelope",
-        "type": "object"
-      },
-      "meta": {
-        "type": "object"
-      },
-      "ok": {
-        "const": false
-      }
-    },
-    "required": [
-      "ok",
-      "error",
-      "meta"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "active_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "annotations_reading": {
+        "type": "string"
+      },
+      "deprecation_policy": {
+        "type": "string"
+      },
+      "error_envelope_resource": {
+        "type": "string"
+      },
+      "fingerprint": {
+        "type": "string"
+      },
+      "fingerprint_covers": {
+        "description": "A contract-semantic change in any listed category changes the fingerprint; nothing outside them does. Release identity is excluded: serverInfo.version, version, server_version change every release WITHOUT moving the fingerprint (incl. its server/discover _meta carrier).",
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "free_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "name": {
+        "type": "string"
+      },
+      "negative_scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "ok": {
+        "const": true,
+        "type": "boolean"
+      },
+      "prerequisites": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "protocol_revision": {
+        "type": "string"
+      },
+      "resource_error_carrier": {
+        "type": "string"
+      },
+      "result_meta_resource": {
+        "type": "string"
+      },
+      "sandboxes": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "schemas": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "server_version": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "stability": {
+        "type": "string"
+      },
+      "tiers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "tool_details": {
+        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
+        "type": "array"
+      },
+      "tool_error_carrier": {
+        "type": "string"
+      },
+      "transport": {
+        "type": "string"
+      },
+      "version": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "version",
+      "transport",
+      "stability",
+      "active_tools",
+      "free_tools",
+      "tiers",
+      "sandboxes",
+      "scope",
+      "negative_scope",
+      "prerequisites",
+      "deprecation_policy"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "description": "Populated error envelope; full schema at resource codex://error-envelope",
+        "type": "object"
+      },
+      "meta": {
+        "type": "object"
+      },
+      "ok": {
+        "const": false
+      }
+    },
+    "required": [
+      "ok",
+      "error",
+      "meta"
+    ],
+    "type": "object"
+  }
+]
  2. Changed4 schema fields changedv0.17.0
    • addedInput schema / properties / detail
      Added value: +{
+  "default": "summary",
+  "description": "What to return: 'summary' (default) returns each tool's name, cost, stability, and error_codes; the *_async tools also get async_lifecycle. 'full' adds use_when, returns, and the parameter lists (which tools/list already carries). 'contracts' drops tool_details: fetch a schema, or recheck fingerprint, without re-paying for the inventory.",
+  "enum": [
+    "summary",
+    "full",
+    "contracts"
+  ],
+  "type": "string"
+}
    • changedInput schema / properties / include_schemas / anyOf
      Previous value: -[
-  {
-    "items": {
-      "enum": [
-        "error-envelope",
-        "result-meta",
-        "capabilities-result",
-        "status-result"
-      ],
-      "type": "string"
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "enum": [
+        "error-envelope",
+        "result-meta",
+        "capabilities-result",
+        "status-result",
+        "parameter-contracts"
+      ],
+      "type": "string"
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedInput schema / properties / include_schemas / description
      Previous value: -"Opt-in tool-reachable fallback for resource-blind clients: also embed the full 'error-envelope', 'result-meta', 'capabilities-result', and/or 'status-result' schema in the response (the default payload omits them and points at the codex:// resources instead)."New value: +"Opt-in tool-reachable fallback for resource-blind clients: also embed the full 'error-envelope', 'result-meta', 'capabilities-result', and/or 'status-result' schema, and/or the 'parameter-contracts' document (a contract doc, not a JSON Schema, sourced from the codex://params resource body), in the response — the default payload omits them and points at the codex:// resources instead."
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "active_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "deprecation_policy": {
-        "type": "string"
-      },
-      "error_envelope_resource": {
-        "type": "string"
-      },
-      "fingerprint": {
-        "type": "string"
-      },
-      "fingerprint_covers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "free_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "name": {
-        "type": "string"
-      },
-      "negative_scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "ok": {
-        "const": true,
-        "type": "boolean"
-      },
-      "prerequisites": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "resource_error_carrier": {
-        "type": "string"
-      },
-      "result_meta_resource": {
-        "type": "string"
-      },
-      "sandboxes": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "schemas": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "server_version": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "stability": {
-        "type": "string"
-      },
-      "tiers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "tool_details": {
-        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
-        "type": "array"
-      },
-      "tool_error_carrier": {
-        "type": "string"
-      },
-      "transport": {
-        "type": "string"
-      },
-      "version": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "name",
-      "version",
-      "transport",
-      "stability",
-      "active_tools",
-      "free_tools",
-      "tiers",
-      "sandboxes",
-      "scope",
-      "negative_scope",
-      "prerequisites",
-      "deprecation_policy"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "error": {
-        "description": "Populated error envelope; full schema at resource codex://error-envelope",
-        "type": "object"
-      },
-      "meta": {
-        "type": "object"
-      },
-      "ok": {
-        "const": false
-      }
-    },
-    "required": [
-      "ok",
-      "error",
-      "meta"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "active_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "annotations_reading": {
+        "type": "string"
+      },
+      "deprecation_policy": {
+        "type": "string"
+      },
+      "error_envelope_resource": {
+        "type": "string"
+      },
+      "fingerprint": {
+        "type": "string"
+      },
+      "fingerprint_covers": {
+        "description": "A contract-semantic change in any listed category changes the fingerprint; nothing outside them does. Release identity is excluded: serverInfo.version, version, server_version change every release WITHOUT moving the fingerprint.",
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "free_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "name": {
+        "type": "string"
+      },
+      "negative_scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "ok": {
+        "const": true,
+        "type": "boolean"
+      },
+      "prerequisites": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "protocol_revision": {
+        "type": "string"
+      },
+      "resource_error_carrier": {
+        "type": "string"
+      },
+      "result_meta_resource": {
+        "type": "string"
+      },
+      "sandboxes": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "schemas": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "server_version": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "stability": {
+        "type": "string"
+      },
+      "tiers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "tool_details": {
+        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
+        "type": "array"
+      },
+      "tool_error_carrier": {
+        "type": "string"
+      },
+      "transport": {
+        "type": "string"
+      },
+      "version": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "version",
+      "transport",
+      "stability",
+      "active_tools",
+      "free_tools",
+      "tiers",
+      "sandboxes",
+      "scope",
+      "negative_scope",
+      "prerequisites",
+      "deprecation_policy"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "description": "Populated error envelope; full schema at resource codex://error-envelope",
+        "type": "object"
+      },
+      "meta": {
+        "type": "object"
+      },
+      "ok": {
+        "const": false
+      }
+    },
+    "required": [
+      "ok",
+      "error",
+      "meta"
+    ],
+    "type": "object"
+  }
+]
  3. Changed1 schema field changedv0.11.0
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "active_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "deprecation_policy": {
-        "type": "string"
-      },
-      "error_envelope_resource": {
-        "type": "string"
-      },
-      "fingerprint": {
-        "type": "string"
-      },
-      "fingerprint_covers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "free_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "name": {
-        "type": "string"
-      },
-      "negative_scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "ok": {
-        "const": true,
-        "type": "boolean"
-      },
-      "prerequisites": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "resource_error_carrier": {
-        "type": "string"
-      },
-      "result_meta_resource": {
-        "type": "string"
-      },
-      "sandboxes": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "schemas": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "stability": {
-        "type": "string"
-      },
-      "tiers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "tool_details": {
-        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
-        "type": "array"
-      },
-      "tool_error_carrier": {
-        "type": "string"
-      },
-      "transport": {
-        "type": "string"
-      },
-      "version": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "name",
-      "version",
-      "transport",
-      "stability",
-      "active_tools",
-      "free_tools",
-      "tiers",
-      "sandboxes",
-      "scope",
-      "negative_scope",
-      "prerequisites",
-      "deprecation_policy"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "error": {
-        "description": "Populated error envelope; full schema at resource codex://error-envelope",
-        "type": "object"
-      },
-      "meta": {
-        "type": "object"
-      },
-      "ok": {
-        "const": false
-      }
-    },
-    "required": [
-      "ok",
-      "error",
-      "meta"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "active_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "deprecation_policy": {
+        "type": "string"
+      },
+      "error_envelope_resource": {
+        "type": "string"
+      },
+      "fingerprint": {
+        "type": "string"
+      },
+      "fingerprint_covers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "free_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "name": {
+        "type": "string"
+      },
+      "negative_scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "ok": {
+        "const": true,
+        "type": "boolean"
+      },
+      "prerequisites": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "resource_error_carrier": {
+        "type": "string"
+      },
+      "result_meta_resource": {
+        "type": "string"
+      },
+      "sandboxes": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "schemas": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "server_version": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "stability": {
+        "type": "string"
+      },
+      "tiers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "tool_details": {
+        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
+        "type": "array"
+      },
+      "tool_error_carrier": {
+        "type": "string"
+      },
+      "transport": {
+        "type": "string"
+      },
+      "version": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "version",
+      "transport",
+      "stability",
+      "active_tools",
+      "free_tools",
+      "tiers",
+      "sandboxes",
+      "scope",
+      "negative_scope",
+      "prerequisites",
+      "deprecation_policy"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "description": "Populated error envelope; full schema at resource codex://error-envelope",
+        "type": "object"
+      },
+      "meta": {
+        "type": "object"
+      },
+      "ok": {
+        "const": false
+      }
+    },
+    "required": [
+      "ok",
+      "error",
+      "meta"
+    ],
+    "type": "object"
+  }
+]
  4. Changed3 schema fields changedv0.9.0
    • changedInput schema / properties / include_schemas / anyOf
      Previous value: -[
-  {
-    "items": {
-      "enum": [
-        "error-envelope",
-        "result-meta"
-      ],
-      "type": "string"
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "enum": [
+        "error-envelope",
+        "result-meta",
+        "capabilities-result",
+        "status-result"
+      ],
+      "type": "string"
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedInput schema / properties / include_schemas / description
      Previous value: -"Opt-in tool-reachable fallback for resource-blind clients: also embed the full 'error-envelope' and/or 'result-meta' schema in the response (the default payload omits them and points at the codex:// resources instead)."New value: +"Opt-in tool-reachable fallback for resource-blind clients: also embed the full 'error-envelope', 'result-meta', 'capabilities-result', and/or 'status-result' schema in the response (the default payload omits them and points at the codex:// resources instead)."
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "active_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "deprecation_policy": {
-        "type": "string"
-      },
-      "error_envelope_resource": {
-        "type": "string"
-      },
-      "fingerprint": {
-        "type": "string"
-      },
-      "fingerprint_covers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "free_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "name": {
-        "type": "string"
-      },
-      "negative_scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "ok": {
-        "const": true,
-        "type": "boolean"
-      },
-      "prerequisites": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "resource_error_carrier": {
-        "type": "string"
-      },
-      "result_meta_resource": {
-        "type": "string"
-      },
-      "sandboxes": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "schemas": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "stability": {
-        "type": "string"
-      },
-      "tiers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "tool_details": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "async_lifecycle": {
-              "anyOf": [
-                {
-                  "additionalProperties": false,
-                  "properties": {
-                    "activity_support": {
-                      "const": "codex_events",
-                      "type": "string"
-                    },
-                    "cancel_tool": {
-                      "type": "string"
-                    },
-                    "consume_tool": {
-                      "type": "string"
-                    },
-                    "event_age_field": {
-                      "type": "string"
-                    },
-                    "event_count_field": {
-                      "type": "string"
-                    },
-                    "last_event_field": {
-                      "type": "string"
-                    },
-                    "lifecycle": {
-                      "const": "codex_job_*",
-                      "type": "string"
-                    },
-                    "list_tool": {
-                      "type": "string"
-                    },
-                    "native_task_support": {
-                      "const": false,
-                      "type": "boolean"
-                    },
-                    "poll_after_field": {
-                      "type": "string"
-                    },
-                    "poll_tool": {
-                      "type": "string"
-                    },
-                    "progress_support": {
-                      "const": "none",
-                      "type": "string"
-                    },
-                    "result_ready_field": {
-                      "type": "string"
-                    },
-                    "result_tool": {
-                      "type": "string"
-                    },
-                    "status_field": {
-                      "type": "string"
-                    }
-                  },
-                  "required": [
-                    "poll_tool",
-                    "result_tool",
-                    "consume_tool",
-                    "cancel_tool",
-                    "list_tool",
-                    "status_field",
-                    "result_ready_field",
-                    "poll_after_field",
-                    "event_count_field",
-                    "last_event_field",
-                    "event_age_field"
-                  ],
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "cost": {
-              "enum": [
-                "free",
-                "active"
-              ],
-              "type": "string"
-            },
-            "error_codes": {
-              "items": {
-                "enum": [
-                  "codex_not_found",
-                  "codex_auth_required",
-                  "unexpanded_env_placeholder",
-                  "unsupported_tier",
-                  "unsupported_sandbox",
-                  "unsupported_isolation",
-                  "unsupported_detail",
-                  "invalid_scope",
-                  "invalid_base",
-                  "invalid_commit",
-                  "invalid_paths",
-                  "invalid_arguments",
-                  "invalid_workspace_root",
-                  "workspace_outside_roots",
-                  "input_too_large",
-                  "not_a_git_repo",
-                  "git_unavailable",
-                  "worktree_error",
-                  "context_too_large",
-                  "resource_not_found",
-                  "timeout",
-                  "nonzero_exit",
-                  "invalid_json",
-                  "schema_violation",
-                  "internal_error",
-                  "cli_contract_changed",
-                  "codex_rate_limited",
-                  "job_not_found",
-                  "job_running",
-                  "job_cancelled",
-                  "job_timeout",
-                  "job_failed",
-                  "idempotency_conflict",
-                  "idempotency_result_unavailable",
-                  "idempotency_in_progress"
-                ],
-                "type": "string"
-              },
-              "type": "array"
-            },
-            "key_optional_params": {
-              "items": {
-                "type": "string"
-              },
-              "type": "array"
-            },
-            "name": {
-              "type": "string"
-            },
-            "required_params": {
-              "items": {
-                "type": "string"
-              },
-              "type": "array"
-            },
-            "returns": {
-              "type": "string"
-            },
-            "stability": {
-              "anyOf": [
-                {
-                  "enum": [
-                    "stable",
-                    "preview",
-                    "experimental"
-                  ],
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "use_when": {
-              "type": "string"
-            }
-          },
-          "required": [
-            "name",
-            "cost",
-            "use_when",
-            "returns"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "tool_error_carrier": {
-        "type": "string"
-      },
-      "transport": {
-        "type": "string"
-      },
-      "version": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "name",
-      "version",
-      "transport",
-      "stability",
-      "active_tools",
-      "free_tools",
-      "tiers",
-      "sandboxes",
-      "scope",
-      "negative_scope",
-      "prerequisites",
-      "deprecation_policy"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "error": {
-        "description": "Populated error envelope; full schema at resource codex://error-envelope",
-        "type": "object"
-      },
-      "meta": {
-        "type": "object"
-      },
-      "ok": {
-        "const": false
-      }
-    },
-    "required": [
-      "ok",
-      "error",
-      "meta"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "active_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "deprecation_policy": {
+        "type": "string"
+      },
+      "error_envelope_resource": {
+        "type": "string"
+      },
+      "fingerprint": {
+        "type": "string"
+      },
+      "fingerprint_covers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "free_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "name": {
+        "type": "string"
+      },
+      "negative_scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "ok": {
+        "const": true,
+        "type": "boolean"
+      },
+      "prerequisites": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "resource_error_carrier": {
+        "type": "string"
+      },
+      "result_meta_resource": {
+        "type": "string"
+      },
+      "sandboxes": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "schemas": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "stability": {
+        "type": "string"
+      },
+      "tiers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "tool_details": {
+        "description": "Per-tool capability records; full schema at resource codex://capabilities-result",
+        "type": "array"
+      },
+      "tool_error_carrier": {
+        "type": "string"
+      },
+      "transport": {
+        "type": "string"
+      },
+      "version": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "version",
+      "transport",
+      "stability",
+      "active_tools",
+      "free_tools",
+      "tiers",
+      "sandboxes",
+      "scope",
+      "negative_scope",
+      "prerequisites",
+      "deprecation_policy"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "description": "Populated error envelope; full schema at resource codex://error-envelope",
+        "type": "object"
+      },
+      "meta": {
+        "type": "object"
+      },
+      "ok": {
+        "const": false
+      }
+    },
+    "required": [
+      "ok",
+      "error",
+      "meta"
+    ],
+    "type": "object"
+  }
+]
  5. Changed3 schema fields changedv0.8.0
    • addedInput schema / properties / include_schemas
      Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "enum": [
+          "error-envelope",
+          "result-meta"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Opt-in tool-reachable fallback for resource-blind clients: also embed the full 'error-envelope' and/or 'result-meta' schema in the response (the default payload omits them and points at the codex:// resources instead)."
+}
    • addedOutput schema / $schema
      Added value: +"https://json-schema.org/draft/2020-12/schema"
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "active_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "deprecation_policy": {
-        "type": "string"
-      },
-      "error_envelope_resource": {
-        "type": "string"
-      },
-      "fingerprint": {
-        "type": "string"
-      },
-      "free_tools": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "name": {
-        "type": "string"
-      },
-      "negative_scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "ok": {
-        "const": true,
-        "type": "boolean"
-      },
-      "prerequisites": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "sandboxes": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "scope": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "stability": {
-        "type": "string"
-      },
-      "tiers": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "tool_details": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "async_lifecycle": {
-              "anyOf": [
-                {
-                  "additionalProperties": false,
-                  "properties": {
-                    "activity_support": {
-                      "const": "codex_events",
-                      "type": "string"
-                    },
-                    "cancel_tool": {
-                      "type": "string"
-                    },
-                    "consume_tool": {
-                      "type": "string"
-                    },
-                    "event_age_field": {
-                      "type": "string"
-                    },
-                    "event_count_field": {
-                      "type": "string"
-                    },
-                    "last_event_field": {
-                      "type": "string"
-                    },
-                    "lifecycle": {
-                      "const": "codex_job_*",
-                      "type": "string"
-                    },
-                    "list_tool": {
-                      "type": "string"
-                    },
-                    "native_task_support": {
-                      "const": false,
-                      "type": "boolean"
-                    },
-                    "poll_after_field": {
-                      "type": "string"
-                    },
-                    "poll_tool": {
-                      "type": "string"
-                    },
-                    "progress_support": {
-                      "const": "none",
-                      "type": "string"
-                    },
-                    "result_ready_field": {
-                      "type": "string"
-                    },
-                    "result_tool": {
-                      "type": "string"
-                    },
-                    "status_field": {
-                      "type": "string"
-                    }
-                  },
-                  "required": [
-                    "poll_tool",
-                    "result_tool",
-                    "consume_tool",
-                    "cancel_tool",
-                    "list_tool",
-                    "status_field",
-                    "result_ready_field",
-                    "poll_after_field",
-                    "event_count_field",
-                    "last_event_field",
-                    "event_age_field"
-                  ],
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "cost": {
-              "enum": [
-                "free",
-                "active"
-              ],
-              "type": "string"
-            },
-            "error_codes": {
-              "items": {
-                "enum": [
-                  "codex_not_found",
-                  "codex_auth_required",
-                  "unexpanded_env_placeholder",
-                  "unsupported_tier",
-                  "unsupported_sandbox",
-                  "unsupported_isolation",
-                  "unsupported_detail",
-                  "invalid_scope",
-                  "invalid_base",
-                  "invalid_commit",
-                  "invalid_paths",
-                  "invalid_arguments",
-                  "invalid_workspace_root",
-                  "workspace_outside_roots",
-                  "input_too_large",
-                  "not_a_git_repo",
-                  "git_unavailable",
-                  "worktree_error",
-                  "context_too_large",
-                  "timeout",
-                  "nonzero_exit",
-                  "invalid_json",
-                  "schema_violation",
-                  "internal_error",
-                  "cli_contract_changed",
-                  "codex_rate_limited",
-                  "job_not_found",
-                  "job_running",
-                  "job_cancelled",
-                  "job_timeout",
-                  "job_failed"
-                ],
-                "type": "string"
-              },
-              "type": "array"
-            },
-            "key_optional_params": {
-              "items": {
-                "type": "string"
-              },
-              "type": "array"
-            },
-            "name": {
-              "type": "string"
-            },
-            "required_params": {
-              "items": {
-                "type": "string"
-              },
-              "type": "array"
-            },
-            "returns": {
-              "type": "string"
-            },
-            "stability": {
-              "anyOf": [
-                {
-                  "enum": [
-                    "stable",
-                    "preview",
-                    "experimental"
-                  ],
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "use_when": {
-              "type": "string"
-            }
-          },
-          "required": [
-            "name",
-            "cost",
-            "use_when",
-            "returns"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "transport": {
-        "type": "string"
-      },
-      "version": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "name",
-      "version",
-      "transport",
-      "stability",
-      "active_tools",
-      "free_tools",
-      "tiers",
-      "sandboxes",
-      "scope",
-      "negative_scope",
-      "prerequisites",
-      "deprecation_policy"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "error": {
-        "description": "Populated error envelope; full schema at resource codex://error-envelope",
-        "type": "object"
-      },
-      "meta": {
-        "type": "object"
-      },
-      "ok": {
-        "const": false
-      }
-    },
-    "required": [
-      "ok",
-      "error",
-      "meta"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "active_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "deprecation_policy": {
+        "type": "string"
+      },
+      "error_envelope_resource": {
+        "type": "string"
+      },
+      "fingerprint": {
+        "type": "string"
+      },
+      "fingerprint_covers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "free_tools": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "name": {
+        "type": "string"
+      },
+      "negative_scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "ok": {
+        "const": true,
+        "type": "boolean"
+      },
+      "prerequisites": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "resource_error_carrier": {
+        "type": "string"
+      },
+      "result_meta_resource": {
+        "type": "string"
+      },
+      "sandboxes": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "schemas": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "scope": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "stability": {
+        "type": "string"
+      },
+      "tiers": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "tool_details": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "async_lifecycle": {
+              "anyOf": [
+                {
+                  "additionalProperties": false,
+                  "properties": {
+                    "activity_support": {
+                      "const": "codex_events",
+                      "type": "string"
+                    },
+                    "cancel_tool": {
+                      "type": "string"
+                    },
+                    "consume_tool": {
+                      "type": "string"
+                    },
+                    "event_age_field": {
+                      "type": "string"
+                    },
+                    "event_count_field": {
+                      "type": "string"
+                    },
+                    "last_event_field": {
+                      "type": "string"
+                    },
+                    "lifecycle": {
+                      "const": "codex_job_*",
+                      "type": "string"
+                    },
+                    "list_tool": {
+                      "type": "string"
+                    },
+                    "native_task_support": {
+                      "const": false,
+                      "type": "boolean"
+                    },
+                    "poll_after_field": {
+                      "type": "string"
+                    },
+                    "poll_tool": {
+                      "type": "string"
+                    },
+                    "progress_support": {
+                      "const": "none",
+                      "type": "string"
+                    },
+                    "result_ready_field": {
+                      "type": "string"
+                    },
+                    "result_tool": {
+                      "type": "string"
+                    },
+                    "status_field": {
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "poll_tool",
+                    "result_tool",
+                    "consume_tool",
+                    "cancel_tool",
+                    "list_tool",
+                    "status_field",
+                    "result_ready_field",
+                    "poll_after_field",
+                    "event_count_field",
+                    "last_event_field",
+                    "event_age_field"
+                  ],
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "cost": {
+              "enum": [
+                "free",
+                "active"
+              ],
+              "type": "string"
+            },
+            "error_codes": {
+              "items": {
+                "enum": [
+                  "codex_not_found",
+                  "codex_auth_required",
+                  "unexpanded_env_placeholder",
+                  "unsupported_tier",
+                  "unsupported_sandbox",
+                  "unsupported_isolation",
+                  "unsupported_detail",
+                  "invalid_scope",
+                  "invalid_base",
+                  "invalid_commit",
+                  "invalid_paths",
+                  "invalid_arguments",
+                  "invalid_workspace_root",
+                  "workspace_outside_roots",
+                  "input_too_large",
+                  "not_a_git_repo",
+                  "git_unavailable",
+                  "worktree_error",
+                  "context_too_large",
+                  "resource_not_found",
+                  "timeout",
+                  "nonzero_exit",
+                  "invalid_json",
+                  "schema_violation",
+                  "internal_error",
+                  "cli_contract_changed",
+                  "codex_rate_limited",
+                  "job_not_found",
+                  "job_running",
+                  "job_cancelled",
+                  "job_timeout",
+                  "job_failed",
+                  "idempotency_conflict",
+                  "idempotency_result_unavailable",
+                  "idempotency_in_progress"
+                ],
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "key_optional_params": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "name": {
+              "type": "string"
+            },
+            "required_params": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "returns": {
+              "type": "string"
+            },
+            "stability": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "stable",
+                    "preview",
+                    "experimental"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "use_when": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "name",
+            "cost",
+            "use_when",
+            "returns"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "tool_error_carrier": {
+        "type": "string"
+      },
+      "transport": {
+        "type": "string"
+      },
+      "version": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "version",
+      "transport",
+      "stability",
+      "active_tools",
+      "free_tools",
+      "tiers",
+      "sandboxes",
+      "scope",
+      "negative_scope",
+      "prerequisites",
+      "deprecation_policy"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "description": "Populated error envelope; full schema at resource codex://error-envelope",
+        "type": "object"
+      },
+      "meta": {
+        "type": "object"
+      },
+      "ok": {
+        "const": false
+      }
+    },
+    "required": [
+      "ok",
+      "error",
+      "meta"
+    ],
+    "type": "object"
+  }
+]
  6. First observedv0.5.0

TDQS

A4.8/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Beyond the annotations, the description discloses that the call is free and makes no model call, that clients can cache by fingerprint, that async_lifecycle appears only for *_async tools, and that the default payload omits embedded schemas and points at codex:// resources. This is rich, accurate behavioral context with no annotation contradiction.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is dense but well-structured: purpose, cost, and caching are front-loaded, and each subsequent paragraph maps cleanly to one parameter or one return mode. No sentence is redundant with the schema.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a read-only capabilities/listing tool with an output schema, the description covers cacheability, detail-mode semantics, schema-embedding fallback, and async distinctions. Nothing essential is missing for an agent to decide whether and how to invoke it.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is already 100%, and the description adds real decision value: it explains the summary/full/contracts trade-off, why full restates known facts, the cost advantage of contracts, and the purpose of include_schemas for resource-blind clients. It also clarifies that parameter-contracts is a contract document, not a JSON Schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The first sentence states a specific verb and resource: 'List this server's tools, tiers, and the result fingerprint.' It also establishes what makes this tool distinct from a standard tools/list call by noting it exposes facts tools/list does not already carry.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives clear context for choosing detail modes: summary returns the non-duplicative facts, full restates what the client already holds, and contracts avoids re-paying for the inventory. It does not explicitly name sibling tools or state when not to call this capability, so it falls just short of full guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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