get_functional_threshold_power_range

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds genuine behavioral detail the schema lacks (default values, upper-casing and regex validation), but says nothing about return shape, range semantics, or rate limits.

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?

Extremely terse with no filler and information front-loaded across semicolon-separated clauses. It is under-informative rather than verbose, but every clause present carries real content.

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?

For a data-retrieval tool with no output schema, the description should explain what is returned (FTP values across a date range) and how start/end bound the result. Instead it covers only two of four parameters and omits any return or range semantics, leaving the agent to infer the tool's output entirely.

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 50%, so the description must compensate, and it does add the two defaults (sport=RUNNING, aggregation=daily) and a validation regex not present in the schema. However it leaves start/end semantics undocumented and gives no valid vocabulary for sport beyond the regex pattern.

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 never states what the tool does, names no verb or resource, and is entirely a dump of parameter defaults and validation rules. The tool name is informative, but the description text itself adds nothing to purpose and would be a tautology at best.

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 when-to-use guidance and no alternatives are named, despite very close siblings such as get_cycling_ftp, get_lactate_threshold, and get_power_zones_for_sport that an agent could easily confuse with this one. The reader gets no signal on which FTP/threshold tool to pick.

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