get_activity_gear

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

The 'Garmin Connect, read-only' clause largely restates the readOnlyHint annotation, adding little. The remaining sentence about date format (YYYY-MM-DD) is irrelevant to this tool, whose only parameter is an activity ID — it consumes the space where useful behavior (empty-gear handling, lookup failures) should be described.

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?

It is short and front-loads the purpose well. However, the parenthetical's date-format sentence does not earn its place for a tool with no date parameter, making the brevity partly accidental rather than disciplined.

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?

An output schema exists, so return values need not be explained. But for a one-parameter lookup the description should at least characterize the input; the misleading date note leaves a real gap and adds irrelevant noise.

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 single parameter has 0% schema description coverage, and the description never mentions activity_id, its expected format, or that it accepts either an integer or a string despite the anyOf schema. Instead it documents dates, which this tool does not accept.

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 states a specific verb and resource (return gear linked to an activity) that is unambiguous and distinct from every sibling, none of which deal with gear. It falls short of a 5 only because it doesn't explicitly position itself against related activity tools like get_activity.

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?

Usage is implied by the resource name: query it for an activity's associated gear. There is no explicit when-to-use, no note on what happens when an activity has no gear, and no mention of alternatives — though no sibling overlaps, so the gap is modest.

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