get_activity_details

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

No annotations are provided, so the description bears full responsibility for behavioral disclosure. It does not mention side effects, authorization requirements, rate limits, or whether the tool is read-only. The description only states what data is retrieved, leaving behavioral traits completely opaque.

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 very concise at two sentences, with the primary purpose front-loaded. It avoids redundancy. However, the second sentence is a parameter list that could be integrated more smoothly. Still, every sentence serves a purpose.

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 presence of many sibling tools and the absence of annotations, the description is incomplete. It does not clarify when to use this tool over alternatives, nor does it provide enough behavioral context (e.g., rate limits, caching). The presence of an output schema partially compensates for return value documentation, but overall the description is too sparse for an AI agent to select and invoke the tool correctly.

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?

Input schema parameter descriptions are absent (0% coverage), placing the burden on the tool description. The description adds only 'Garmin activity ID' for the 'activity_id' parameter, which adds minimal semantic value beyond the schema's type and title. For a single required parameter, more detail on format or source would be helpful.

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 clearly states the tool's purpose: 'Get detailed metrics for an activity (laps, charts, etc.)'. It uses a specific verb and resource, and the examples (laps, charts) help distinguish it from sibling tools like 'get_activity' or 'get_activity_splits'.

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?

No explicit guidance on when to use this tool versus alternatives. The description does not mention prerequisites, scenarios, or when to choose this over other 'get_activity_*' siblings. The usage context is only implied by the name and description.

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