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LamantinAI

kaeru memory

by LamantinAI
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Rust
Hybrid

history

Read-only

Read recorded versions and audit events for a node to track changes over time, with fields flagged when prior values were not stored.

Instructions

Read recorded versions and audit events, labeling fields whose prior values are not stored.

Input Schema

NameRequiredDescriptionDefault
nodeYes
cursorNo
initiativeYes
budget_charsNo

Output Schema

NameRequiredDescriptionDefault
dataYes
stateYes
issuesYes
coverageNo
replayedYes
operationYes
request_idNo
api_versionYes
continuationNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed12 schema fields changedv0.8.0
    • addedInput schema / $defs
      Added value: +{
+  "NodeRef": {
+    "oneOf": [
+      {
+        "description": "Returned UUID or exact name in the call initiative; ambiguity is an error.",
+        "minLength": 1,
+        "type": "string"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "id": {
+            "description": "Returned canonical ID, including IDs from older vaults.",
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "id"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "initiative": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "name": {
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "name",
+          "initiative"
+        ],
+        "type": "object"
+      }
+    ]
+  }
+}
    • addedInput schema / additionalProperties
      Added value: +false
    • addedInput schema / properties / budget_chars
      Added value: +{
+  "default": 8000,
+  "maximum": 64000,
+  "minimum": 512,
+  "type": "integer"
+}
    • addedInput schema / properties / cursor
      Added value: +{
+  "minLength": 1,
+  "type": "string"
+}
    • removedInput schema / properties / initiative / default
      Removed value: -null
    • addedInput schema / properties / initiative / minLength
      Added value: +1
    • changedInput schema / properties / initiative / type
      Previous value: -[
-  "string",
-  "null"
-]New value: +"string"
    • removedInput schema / properties / name
      Removed value: -{
-  "description": "Node name (also accepts a UUIDv7 id where the verb supports\npolymorphic resolution).",
-  "type": "string"
-}
    • addedInput schema / properties / node
      Added value: +{
+  "$ref": "#/$defs/NodeRef"
+}
    • changedInput schema / required
      Previous value: -[
-  "name"
-]New value: +[
+  "initiative",
+  "node"
+]
    • removedInput schema / title
      Removed value: -"NameScope"
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$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"
+    },
+    "ContentRange": {
+      "properties": {
+        "end": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "start": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "total": {
+          "format": "uint",
+          "minimum": 0,
+          "type": "integer"
+        }
+      },
+      "required": [
+        "start",
+        "end",
+        "total"
+      ],
+      "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"
+    },
+    "HistoryData": {
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "lineage": {
+          "items": {
+            "$ref": "#/$defs/RelationData"
+          },
+          "type": "array"
+        },
+        "metadata_events": {
+          "items": true,
+          "type": "array"
+        },
+        "versions": {
+          "items": {
+            "$ref": "#/$defs/HistoryEvent"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "id",
+        "versions",
+        "metadata_events",
+        "lineage"
+      ],
+      "type": "object"
+    },
+    "HistoryEvent": {
+      "properties": {
+        "asserted": {
+          "type": "boolean"
+        },
+        "body": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "body_range": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/ContentRange"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "name": {
+          "type": "string"
+        },
+        "recorded_at": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "recorded_at",
+        "asserted",
+        "name"
+      ],
+      "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"
+    },
+    "RelationData": {
+      "properties": {
+        "dst_store": {
+          "type": "string"
+        },
+        "edge_type": {
+          "type": "string"
+        },
+        "from": {
+          "type": "string"
+        },
+        "properties": true,
+        "revision": {
+          "type": "string"
+        },
+        "to": {
+          "type": "string"
+        },
+        "weight": {
+          "format": "double",
+          "type": "number"
+        }
+      },
+      "required": [
+        "revision",
+        "from",
+        "to",
+        "edge_type",
+        "weight",
+        "properties",
+        "dst_store"
+      ],
+      "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": "#/$defs/Coverage"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "data": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/HistoryData"
+        },
+        {
+          "$ref": "#/$defs/MutationData"
+        }
+      ]
+    },
+    "issues": {
+      "items": {
+        "$ref": "#/$defs/Issue"
+      },
+      "type": "array"
+    },
+    "operation": {
+      "const": "history",
+      "type": "string"
+    },
+    "replayed": {
+      "type": "boolean"
+    },
+    "request_id": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "state": {
+      "$ref": "#/$defs/State"
+    }
+  },
+  "required": [
+    "api_version",
+    "operation",
+    "state",
+    "replayed",
+    "data",
+    "issues"
+  ],
+  "title": "Response",
+  "type": "object"
+}
  2. First observedv0.7.5

TDQS

C2.9/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds one genuinely useful behavioral detail: fields whose prior values are not stored get labeled, so the agent knows partial history is possible. It says nothing about ordering, pagination via cursor, or what budget_chars truncation does.

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 front-loaded sentence with no wasted words; the core verb and resource come first. It is terse to the point of under-specifying, but nothing is redundant.

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?

An output schema exists, so return values needn't be explained, and annotations cover read-only safety. However, for a tool with a nested NodeRef reference, cursor pagination, and a char budget, the description leaves all invocation mechanics and scoping unexplained.

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 reported at 0%, yet the description mentions none of the four parameters. 'cursor', 'budget_chars', and 'initiative' are undocumented in both places, so the agent must infer pagination and response-size control entirely from names and defaults.

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

Purpose4/5

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

The description gives a specific verb and resource: 'Read recorded versions and audit events' for a node. It is clear what the tool returns, but it doesn't differentiate itself from vague-named siblings like 'trail', 'context', or 'read', so an agent must infer the boundary.

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?

There is no explicit when-to-use or when-not-to-use guidance, and no alternative tool is named. An agent must guess whether to reach for this versus 'trail', 'context', or 'read' when inspecting an entity's past.

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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