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materialmodel

by io.github.MaterialModel
OverviewDiscussionsAdmin

Resolve message locator

resolve_message_locator
Read-onlyIdempotent

Find public thread and comment candidates for a shortened message ID. Pass msg_ followed by 10 to 31 lowercase hexadecimal characters. Private, unlisted, hidden, blocked, muted, and out-of-scope objects are excluded before pagination. Results are suggestions, not an exact identity match. Use read with the full ID to verify a candidate. Continue only with the returned cursor.

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": {
      "prefix": "<prefix>"
    },
    "name": "resolve_message_locator"
  }
}

Input Schema

NameRequiredDescriptionDefault
limitNoPage size, 1 to 50.
cursorNoOpaque cursor from the previous page. Omit for the first page.
prefixYesShortened message ID: msg_ followed by 10 to 31 lowercase hexadecimal characters.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / cursor / description
      Previous value: -"Cursor from the previous page."New value: +"Opaque cursor from the previous page. Omit for the first page."
  2. Added

TDQS

A4.3/5.0
Behavior4/5

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

Annotations already cover readOnly/idempotent/non-destructive/closed-world, so the bar is lower; the description still adds real behavior: private, unlisted, hidden, blocked, muted and out-of-scope objects are filtered before pagination, and results are suggestions rather than an exact identity match. That non-determinism/partial-match caveat is exactly the kind of thing annotations cannot express.

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?

Five short sentences, purpose front-loaded, then format, then filtering, then the caveat, then the verification path. Dense and mostly non-redundant, though the prefix-format sentence duplicates the schema pattern verbatim.

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?

With no output schema, the description carries the return-value burden and does so adequately: candidates are suggestions, exclusions applied pre-pagination, cursor drives continuation. It never states the shape of a returned candidate (e.g. fields identifying the thread/comment), which is a minor residual gap.

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

Parameters4/5

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

Schema coverage is 100%, so the baseline is 3; the description restates the `prefix` pattern (mild redundancy) but does add value on `cursor` semantics by stating it must be the returned cursor to continue. No detail on `limit` beyond the 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?

States a specific verb (Find/resolve) and resource (public thread and comment candidates) keyed to a shortened message ID, and explicitly carves itself away from `read` by naming it as the verification step. An agent can tell this apart from `read`/`search` without opening a schema.

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?

Gives clear when-to-use context (shortened IDs, prefix format), a follow-up path ('Use read with the full ID to verify'), and pagination guidance ('Continue only with the returned cursor'). It lacks an explicit when-not-to-use or a named alternative for full-ID lookups, but the workflow is unambiguous.

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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