Get Garmin activity exercise sets

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the description need not repeat safety. The description adds behavioral context by specifying that it returns per-set details and that duration is included 'when available', which is a useful caveat not present in annotations. It also notes the China-specific scope. This is valuable beyond structured data, though it does not cover error cases or pagination—acceptable given the annotations.

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, front-loaded sentence that immediately states the action and resource. It includes the most important detail (per-set strength) first and lists the included fields succinctly. There is no redundant wording or filler. It earns its place in every clause.

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?

The tool is simple (1 parameter) and has an output schema that presumably documents return values. The description provides enough context for correct invocation: it specifies the activity ID requirement, the type of data returned, and the optionality of duration. No critical information is missing for an agent to call this tool appropriately.

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?

With schema coverage at 0% (the parameter has no description in the schema), the description must compensate, and it does. It clarifies that activity_id is a Garmin China activity ID and must be positive (integer), adding meaning beyond the raw type. It does not give examples or address how to obtain the ID, but for a single parameter this is sufficient. The description meaningfully enhances schema information.

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 specifies a clear verb ('get'), a precise resource ('per-set strength exercise details'), and a clear scope ('for one positive Garmin China activity ID'). This distinguishes it from sibling tools like get_activity_details and get_activity_supplementary by focusing on strength exercise sets with specific attributes (set type, exercises, repetitions, weight, duration). The purpose is immediately understandable and non-tautological.

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 this tool: when you need per-set strength exercise details for a specific activity. It also constrains the input to a positive Garmin China activity ID. While it does not explicitly name alternatives or state when not to use this tool, the context is clear enough for an agent to infer that it is appropriate for strength-focused activity queries. This matches 'clear context, no exclusions' rather than full explicit routing.

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