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Baho73

mcp-server-matrix

by Baho73

resolve_alias

Resolve a Matrix room alias to a room ID. Input the alias (e.g., #general:matrix.org) to get the canonical room identifier.

Instructions

Resolve a Matrix room alias (#room:server) to a room ID.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
aliasYesRoom alias (e.g. #general:matrix.org)
Behavior3/5

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

No annotations are provided, so the description carries full burden. It indicates a read operation ('resolve') but does not mention error cases, such as alias not found, or any rate limits. For a simple lookup, this is minimally adequate but could be more explicit.

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?

A single, clear sentence that is front-loaded with the action and subject. No redundant information; every word earns its place.

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 tool with one parameter, no output schema, and no annotations, the description is largely complete. It explains the input format but does not explicitly state the output (room ID), though it is implied. Slight improvement could be adding a brief note about the return value.

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?

The input schema has 100% description coverage, with 'alias' described as a room alias with an example. The description adds no additional meaning beyond the schema, meeting the baseline for high coverage.

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 description clearly states the tool resolves a Matrix room alias to a room ID, specifying the alias format (#room:server). This verb+resource combination is distinct from sibling tools, which focus on room management or messaging.

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?

The description implies when to use (when an alias needs conversion) but provides no explicit guidance on when not to use, alternatives, or prerequisites. No sibling comparison is mentioned.

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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