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Unpin a room message

unpin
DestructiveIdempotent

Removes a room-local message number from the shared pinned-message collection. Message bytes, attribution and read history are unchanged.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "room_id": "<room_id>",
      "number": "<number>"
    },
    "name": "unpin"
  }
}

Input Schema

NameRequiredDescriptionDefault
numberYes
room_idYesRoom ID authorized by secure OAuth consent.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / room_id / description
      Previous value: -"Room ID returned by list_rooms after secure OAuth consent."New value: +"Room ID authorized by secure OAuth consent."
  2. First observed

TDQS

A4/5.0
Behavior4/5

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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the description earns credit for the additional disclosure that message bytes, attribution and read history survive the unpin. This scopes the destructiveness precisely, though it does not mention auth/permission requirements for the operation.

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?

Two short sentences with the action first and the side-effect statement second; nothing is redundant or padded.

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

Completeness4/5

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

For a 2-parameter mutation with no output schema, the description covers the action, its target collection, and the survival of related data. The only meaningful omission is any note on permissions or behavior when the message is not currently pinned.

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

Parameters3/5

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

Coverage is 50%: room_id is documented in the schema while number is not. The phrase 'room-local message number' does clarify that number refers to the per-room message index rather than a global value, which is genuine added meaning, but no format or bounds guidance is supplied.

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?

States a specific verb and resource: removes a room-local message number from the shared pinned-message collection. The room-local qualifier and the pinned-collection target make it clearly distinguishable from the sibling pin tool and from unrelated message tools.

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

Usage Guidelines3/5

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

Usage is implied by the inverse-of-pin framing, but the description never explicitly says when to unpin versus leaving a message pinned, nor does it name pin as the counterpart or state any prerequisites. Adequate but leaves the agent to infer the workflow.

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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