get_vo2max_and_fitness

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

No annotations are provided, so the description carries full burden. It does not disclose whether this operation is read-only, whether it requires specific user permissions, or what side effects occur (e.g., data is not modified). The format of the returned data (e.g., JSON object with specific fields) is also not described beyond the initial list.

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 brief (two lines plus a simple argument list), but the summary line could be rephrased to be more complete. It wastes no words but lacks a clear verb.

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 only one parameter with a default and an output schema, the description covers the basic purpose. However, it does not explain the relationship between the returned fields (e.g., fitness age vs. training status) or how this differs from other health tools like get_hrv or get_daily_summary.

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 description coverage is 0%, meaning the schema provides no description for the 'day' parameter. The description adds only an example ('today' or '2026-08-18'), but does not clarify the default behavior (default='today'), timezone handling, or date format requirements. This is insufficient to 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 explicitly states 'VO2 max (aerobic fitness), fitness age and training status' as the returned data. However, it does not clearly state that the tool *gets* or *retrieves* this data, and among siblings like get_daily_summary, the distinction is unclear.

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 usage guidelines are provided. The description does not specify when to use this tool versus alternatives like get_daily_summary or get_training_readiness, nor does it mention any prerequisites or contraindications.

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