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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description usefully specifies that the profile is public and content-bearing rather than a mutation, but says nothing about behavior for an unknown/invalid handle or whether the response is trimmed for private data.

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?

A single front-loaded sentence that names the resource first and then enumerates its contents. No filler, no repetition of the title, and nothing that fails to earn its place.

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?

With no output schema, the description compensates by enumerating the returned fields (location, division, best time, race results, upcoming races, sponsor link), which is exactly what an agent needs to decide relevance. Only minor gaps remain, such as behavior on an unknown handle.

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 100% and the single 'handle' parameter is fully documented there ('without @'), so the baseline of 3 applies. The description adds no syntax, format, or lookup-semantics detail beyond what the schema provides.

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?

States a specific verb+resource ('One athlete's public profile') and enumerates the fields returned, so the agent knows exactly what it retrieves. The singular 'One athlete's' implicitly separates it from the search_athletes sibling, but no sibling is named explicitly.

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?

Usage is only implied: you need a handle and want the full profile of a single athlete, versus search_athletes for discovery. No explicit when-to-use, when-not-to-use, or alternative is stated, so the agent must infer the routing itself.

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