Garmin MCP Capabilities

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true. The description adds context about explaining privacy boundaries and workflow, but does not disclose additional behavioral traits like auth requirements or response volume. With strong annotations, the description adds moderate value.

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

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

The description is a single sentence that front-loads the core purpose. It is efficient with no wasted words, though a slightly more structured format could improve scannability.

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

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

Given the tool's meta role among many data-retrieval siblings, the description covers key aspects (data, privacy, workflow, links). The presence of an output schema means return values need no explanation. A suggestion to use this tool first would enhance completeness but is not strictly required.

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

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

The schema has 0% description coverage for the sole parameter (response_format). The description does not mention this parameter or explain how to use it (e.g., selecting markdown vs JSON output). For a tool with one optional parameter, the description should compensate for missing schema descriptions but fails to do so.

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

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

The description uses the verb 'explain' and specifies the resources: 'supported Garmin data, privacy boundaries, recommended agent workflow and project links'. This clearly distinguishes it from sibling tools that retrieve specific data (e.g., get_daily_summary) or handle authentication (garmin_auth_instructions).

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

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

The description implies the tool is for introductory/overview purposes but does not explicitly state when to use it versus alternatives like garmin_quickstart or garmin_agent_manifest. No 'when not to use' or ordering guidance is provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.