get_activity_laps

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

With no annotations, the description carries the burden of behavioral disclosure. It states the output metrics (time, distance, pace, heart rate), which is useful, but it does not clarify whether the response is a single lap or an array, nor any access requirements or limitations. It only implies safety via the verb "Get".

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 two concise sentences with the main action front-loaded. Every word contributes value with no unnecessary detail.

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 low complexity (one parameter, no output schema), the description sufficiently explains what the tool does and what metrics are included. A minor gap is the lack of explicit statement about the return shape (e.g., array of laps), but it does not impede understanding for a simple read operation.

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?

Schema coverage is 100% with activity_id described as "The activity's numeric ID." The description adds "for a specific activity" but provides no additional meaning beyond what the schema already documents.

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?

"Get lap data" is a specific verb+resource, and "for a specific activity" scopes it clearly. This distinguishes it from siblings like get_activity (overall activity) and get_activity_zones (heart rate zones), which serve different purposes.

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 when to use the tool—when lap data is needed for a specific activity—but does not explicitly mention alternatives or exclusion criteria. It doesn't state that get_activity would be used for overall activity details, leaving the agent to infer the distinction.

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