get_vo2max_trend

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

With no annotations provided, the description fully carries the transparency burden. It discloses key behaviors: estimates are smoothed, daily changes <0.5 are noise, days without recompute carry forward the last value (with a 'carried_forward' flag), and if historical data is unavailable, the current profile estimate is returned separately. This is thorough and honest.

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 moderately verbose but each sentence adds meaningful information (purpose, interpretation, behavior, format, range). There is a slight redundancy with the recommended range stated twice (4-12 weeks and 4-6 week trend), but it does not detract significantly from clarity.

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 that an output schema is indicated (though not shown), the description need not detail return fields. It sufficiently covers what the tool does, when to use it, and the important behavioral edge cases. It could mention error conditions or rate limits, but those are not central to invoking it 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?

The schema provides no descriptions for start_date or end_date (0% coverage), but the description adds the YYYY-MM-DD format and recommends a 4–12 week range with a 90-day maximum. It does not explicitly define each parameter individually, but the format and range guidance substantially compensate for the missing schema descriptions.

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 specific resource ('VO2 max trend') and the action ('Get') over a date range, which distinguishes it from the many other get_* trend tools. The first sentence alone provides a precise purpose.

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?

It provides explicit guidance on when to use the tool (to track fitness gains over weeks) and how to interpret results (flat/declining over 4+ weeks suggests insufficient stimulus). It lacks explicit comparison to alternatives like get_training_load_trend or get_hrv_trend, but the focus on VO2 max is clear enough.

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