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claim

Record an open hypothesis or save a reached verdict with supporting evidence in a single call to keep agent reasoning persistent across sessions.

Instructions

Create an open hypothesis, or save an already reached verdict together with its evidence in one call.

Input Schema

Name	Required	Description	Default
`text`	Yes
`about`	No
`options`	No
`evidence`	No
`initiative`	Yes
`request_id`	No	Optional stable operation key supplied by the host/SDK; see replay contract.
`initial_status`	No		open

Output Schema

Name	Required	Description	Default
`data`	Yes
`state`	Yes
`issues`	Yes
`coverage`	No
`replayed`	Yes
`operation`	Yes
`request_id`	No
`api_version`	Yes
`continuation`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed21 schema fields changedv0.8.0Oct 21, 2026

addedInput schema / $defs

Added value: +{
+  "CaptureOptions": {
+    "additionalProperties": false,
+    "allOf": [
+      {
+        "additionalProperties": false,
+        "properties": {
+          "expected_slot_revision": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "layer": {
+            "$ref": "#/$defs/Layer"
+          },
+          "slot": {
+            "$ref": "#/$defs/Slot"
+          }
+        },
+        "required": [],
+        "type": "object"
+      },
+      {
+        "if": {
+          "required": [
+            "expected_slot_revision"
+          ]
+        },
+        "then": {
+          "required": [
+            "slot"
+          ]
+        }
+      }
+    ],
+    "properties": {
+      "expected_slot_revision": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "layer": {
+        "$ref": "#/$defs/Layer"
+      },
+      "slot": {
+        "$ref": "#/$defs/Slot"
+      }
+    },
+    "required": [],
+    "type": "object"
+  },
+  "Evidence": {
+    "oneOf": [
+      {
+        "additionalProperties": false,
+        "properties": {
+          "node": {
+            "$ref": "#/$defs/NodeRef"
+          }
+        },
+        "required": [
+          "node"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "method": {
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "method"
+        ],
+        "type": "object"
+      }
+    ]
+  },
+  "Layer": {
+    "enum": [
+      "core",
+      "hot",
+      "warm",
+      "cold",
+      "frozen"
+    ],
+    "type": "string"
+  },
+  "NodeRef": {
+    "oneOf": [
+      {
+        "description": "Returned UUID or exact name in the call initiative; ambiguity is an error.",
+        "minLength": 1,
+        "type": "string"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "id": {
+            "description": "Returned canonical ID, including IDs from older vaults.",
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "id"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "initiative": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "name": {
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "name",
+          "initiative"
+        ],
+        "type": "object"
+      }
+    ]
+  },
+  "Slot": {
+    "maxLength": 64,
+    "minLength": 1,
+    "pattern": "^[a-z][a-z0-9_-]*$",
+    "type": "string"
+  }
+}

addedInput schema / additionalProperties
```
Added value: +false
```
addedInput schema / properties / about / $ref
```
Added value: +"#/$defs/NodeRef"
```
removedInput schema / properties / about / default
```
Removed value: -null
```

removedInput schema / properties / about / description

Removed value: -"Optional existing node this claim is about (refers_to edge)."

removedInput schema / properties / about / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

removedInput schema / properties / by

Removed value: -{
-  "default": null,
-  "description": "Evidence node (name or id) the verdict rests on — linked `verifies` /\n`falsifies`. Optional, but a verdict without one is a claim with no\ncitation.",
-  "type": [
-    "string",
-    "null"
-  ]
-}

addedInput schema / properties / evidence

Added value: +{
+  "$ref": "#/$defs/Evidence"
+}

addedInput schema / properties / initial_status

Added value: +{
+  "default": "open",
+  "enum": [
+    "open",
+    "supported",
+    "refuted",
+    "inconclusive"
+  ],
+  "type": "string"
+}

removedInput schema / properties / initiative / default
```
Removed value: -null
```
addedInput schema / properties / initiative / minLength
```
Added value: +1
```

changedInput schema / properties / initiative / type

Previous value: -[
-  "string",
-  "null"
-]New value: +"string"

removedInput schema / properties / layer

Removed value: -{
-  "default": null,
-  "description": "Optional memory layer stamped at creation: `core`, `hot`, `warm`,\n`cold`, or `frozen`. Defaults to `warm`.",
-  "type": [
-    "string",
-    "null"
-  ]
-}

addedInput schema / properties / options

Added value: +{
+  "$ref": "#/$defs/CaptureOptions"
+}

addedInput schema / properties / request_id

Added value: +{
+  "description": "Optional stable operation key supplied by the host/SDK; see replay contract.",
+  "minLength": 1,
+  "type": "string"
+}

removedInput schema / properties / text / description

Removed value: -"The hypothesis text. Auto-named from first words + id suffix."

addedInput schema / properties / text / minLength
```
Added value: +1
```

removedInput schema / properties / verdict

Removed value: -{
-  "default": null,
-  "description": "The verdict, when you ALREADY KNOW IT — the usual case, since you\nnormally reach memory after the check has run. Omit for a genuinely\nopen question. A CLOSED vocabulary, one of exactly these: `supported`,\n`refuted`, `inconclusive` (`confirmed` / `falsified` / `partial` are\naccepted as aliases).",
-  "type": [
-    "string",
-    "null"
-  ]
-}

changedInput schema / required

Previous value: -[
-  "text"
-]New value: +[
+  "initiative",
+  "text"
+]

removedInput schema / title
```
Removed value: -"ClaimParams"
```

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$defs": {
+    "AmgOmission": {
+      "additionalProperties": false,
+      "properties": {
+        "count": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "reason": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "reason",
+        "count"
+      ],
+      "type": "object"
+    },
+    "ArchiveFormat": {
+      "enum": [
+        "markdown",
+        "amg"
+      ],
+      "type": "string"
+    },
+    "Artifact": {
+      "properties": {
+        "bytes": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "edges": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "format": {
+          "$ref": "#/$defs/ArchiveFormat"
+        },
+        "initiatives": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "nodes": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "omissions": {
+          "items": {
+            "$ref": "#/$defs/AmgOmission"
+          },
+          "type": "array"
+        },
+        "path": {
+          "type": "string"
+        },
+        "sha256": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "path",
+        "format",
+        "bytes",
+        "sha256",
+        "initiatives",
+        "omissions",
+        "nodes",
+        "edges"
+      ],
+      "type": "object"
+    },
+    "Change": {
+      "properties": {
+        "after": true,
+        "before": true,
+        "field": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "field",
+        "before",
+        "after"
+      ],
+      "type": "object"
+    },
+    "Continuation": {
+      "properties": {
+        "cursor": {
+          "type": "string"
+        },
+        "next_arguments": true
+      },
+      "required": [
+        "cursor",
+        "next_arguments"
+      ],
+      "type": "object"
+    },
+    "Coverage": {
+      "properties": {
+        "complete": {
+          "type": "boolean"
+        },
+        "initiatives": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "omitted": {
+          "items": {
+            "$ref": "#/$defs/Omission"
+          },
+          "type": "array"
+        },
+        "rules_complete": {
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "initiatives",
+        "complete",
+        "rules_complete",
+        "omitted"
+      ],
+      "type": "object"
+    },
+    "Entity": {
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "revision": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "revision"
+      ],
+      "type": "object"
+    },
+    "EvidenceResult": {
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "relation": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "relation"
+      ],
+      "type": "object"
+    },
+    "FailedStep": {
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "step": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "step",
+        "code",
+        "message"
+      ],
+      "type": "object"
+    },
+    "Issue": {
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "field": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "message": {
+          "type": "string"
+        },
+        "retryable": {
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "code",
+        "message",
+        "retryable"
+      ],
+      "type": "object"
+    },
+    "MutationData": {
+      "properties": {
+        "affected": {
+          "items": {
+            "$ref": "#/$defs/Entity"
+          },
+          "type": "array"
+        },
+        "artifacts": {
+          "items": {
+            "$ref": "#/$defs/Artifact"
+          },
+          "type": "array"
+        },
+        "changes": {
+          "items": {
+            "$ref": "#/$defs/Change"
+          },
+          "type": "array"
+        },
+        "created": {
+          "items": {
+            "$ref": "#/$defs/Entity"
+          },
+          "type": "array"
+        },
+        "evidence": {
+          "items": {
+            "$ref": "#/$defs/EvidenceResult"
+          },
+          "type": "array"
+        },
+        "failed_steps": {
+          "items": {
+            "$ref": "#/$defs/FailedStep"
+          },
+          "type": "array"
+        },
+        "primary": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/Entity"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "slots": {
+          "items": {
+            "$ref": "#/$defs/SlotChange"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "created",
+        "affected",
+        "changes",
+        "evidence",
+        "failed_steps",
+        "slots",
+        "artifacts"
+      ],
+      "type": "object"
+    },
+    "Omission": {
+      "properties": {
+        "count": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "reason": {
+          "type": "string"
+        },
+        "section": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "section",
+        "count",
+        "reason"
+      ],
+      "type": "object"
+    },
+    "SlotChange": {
+      "properties": {
+        "after": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "before": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "revision": {
+          "type": "string"
+        },
+        "slot": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "slot",
+        "revision"
+      ],
+      "type": "object"
+    },
+    "State": {
+      "enum": [
+        "ok",
+        "applied",
+        "unchanged",
+        "partial",
+        "rejected"
+      ],
+      "type": "string"
+    }
+  },
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "properties": {
+    "api_version": {
+      "const": 1,
+      "format": "uint32",
+      "minimum": 0,
+      "type": "integer"
+    },
+    "continuation": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/Continuation"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "coverage": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/Coverage"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "data": {
+      "$ref": "#/$defs/MutationData"
+    },
+    "issues": {
+      "items": {
+        "$ref": "#/$defs/Issue"
+      },
+      "type": "array"
+    },
+    "operation": {
+      "const": "claim",
+      "type": "string"
+    },
+    "replayed": {
+      "type": "boolean"
+    },
+    "request_id": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "state": {
+      "$ref": "#/$defs/State"
+    }
+  },
+  "required": [
+    "api_version",
+    "operation",
+    "state",
+    "replayed",
+    "data",
+    "issues"
+  ],
+  "title": "Response",
+  "type": "object"
+}

First observedv0.7.5Oct 5, 2026

TDQS

C2.4/5.0

Behavior2/5

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

Annotations supply only readOnlyHint=false, so the description carries nearly the whole burden. It never says what node is created, whether the operation is idempotent (the request_id/replay contract lives only in the schema), how slot-revision conflicts behave, or what errors occur on ambiguous NodeRefs.

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

Conciseness4/5

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

A single well-formed sentence with zero filler, and the primary action is front-loaded. It is efficient, though efficiency here comes at the cost of coverage rather than from disciplined pruning.

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

Completeness2/5

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

For a 7-parameter mutation tool with 14% schema coverage, an output schema, and dense sibling overlap (verdict, revise, note, task), one sentence is far short of what an agent needs. The output schema relieves the return-value burden, but parameter and routing gaps remain substantial.

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

Parameters2/5

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

Schema description coverage is 14% across 7 parameters, so the description must compensate and largely does not. It gestures at evidence and the open-vs-verdict status split, but says nothing about initiative, about, options (slot/layer/expected_slot_revision), or the required text field's expected format.

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

Purpose3/5

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

It names two concrete actions (create an open hypothesis, save a reached verdict plus evidence) attached to a resource called a claim, so the broad purpose is graspable. But the dual-mode framing is never reconciled with what a 'claim' actually is, and nothing distinguishes it from siblings like verdict, note, or revise, which plausibly overlap.

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

Usage Guidelines2/5

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

'or save an already reached verdict ... in one call' hints at an atomicity advantage over making separate calls, but there is no explicit when-to-use, when-not-to-use, or named alternative among the many sibling tools (verdict, revise, note). An agent has to guess whether this replaces or complements verdict.

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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