get_activity_weather

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

With no annotations, the description should disclose all behavioral traits. It states it returns weather conditions but omits details like required conditions (e.g., activity must have been recorded with weather sensors), possible errors (e.g., no weather data), or the structure of the response. This is insufficient for a mutation-free read tool.

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 short (two lines), which is concise but sacrifices necessary detail. It front-loads the purpose, but the overall structure is minimal and could benefit from additional context while remaining brief.

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 has one parameter and an output schema, the description should still cover preconditions, error cases, and result format. It lacks any context about when weather data is available, how to interpret results, or relationships to other tools. This incompleteness limits usability.

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 description adds minimal value beyond the schema. It repeats 'activity_id: Garmin activity ID,' which matches the schema's title and type. For a single required parameter with 0% schema coverage, the description should clarify its role, valid values, or source, but does not.

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 'Get weather conditions during an activity,' identifying the specific verb (get) and resource (weather conditions for an activity). It distinguishes from sibling tools like get_activity or get_activity_details, which focus on other aspects.

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 guidance on when to use this tool versus alternatives. For example, it does not explain that weather is only available for outdoor activities or require certain device features, nor does it mention related tools like get_activity_details that might include weather.

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