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 the useful behavioral detail that articles are returned as a single page (pagination constraint), but says nothing about auth, rate limits, or how url/slug/page interact.

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 enumerates the payload with no wasted words. Efficient, though it uses description space on field listing that the output schema already covers.

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 return-value detail is redundant rather than necessary. The real gap is the three entirely undocumented parameters (0 required, 0% coverage), which the description does not compensate for, leaving invocation ambiguity.

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 coverage is 0% and the description does not clarify the roles of url, slug, and page, nor which is authoritative when multiple are supplied. 'One page of their recent articles' loosely hints at the page parameter but adds no format or default detail.

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 resource (a Guardian contributor's public profile) and enumerates the returned fields, so the agent knows exactly what it fetches. It does not explicitly contrast with siblings guardian_article/guardian_headlines, but the resource is distinct enough to be identifiable on its own.

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?

There is no when-to-use guidance, no mention of alternatives, and no indication of when to prefer this over guardian_article or guardian_topic. An agent must infer everything from the tool name.

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