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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety profile. The description adds value by listing exactly what the profile contains, but says nothing about input expectations (it clearly needs an author URL/identifier) or any retrieval constraints.

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 efficient sentence that front-loads the resource and then the returned fields. No wasted words, though it could have used its brevity budget on the input instead of only the output.

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?

An output schema exists, so the description needn't explain return values, and the annotation covers safety. However, with the sole required parameter completely undocumented in the schema, the description leaves an agent without enough to construct a correct call.

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% for the single required 'url' parameter, so the schema gives no guidance. The description never explains what that URL should be (author profile URL vs. article URL), leaving the only input undocumented in both places.

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 clear resource ('One IGN author's public profile') and enumerates the retrieved fields (name, job title, location, biography, social links, recent articles). It is distinguishable from siblings like ign_article or ign_headlines, though the retrieval verb is only implied rather than stated.

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 implied by the field list – an agent can infer this fetches an author profile – but there is no explicit when-to-use statement, no mention of alternatives such as ign_article for reading their content, and no prerequisites.

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