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 only restates return content (name, biography, recent articles), which is redundant given an output schema exists, and adds nothing about lookup behavior, missing-author handling, or url-vs-slug resolution.

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 states the resource and the returned fields with no filler. It is well-sized, though it spends its words on return values rather than the more decision-relevant parameter semantics.

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?

The output schema covers return values, but for a two-parameter lookup tool with no parameter descriptions and no usage guidance, the definition leaves the agent unable to determine how to actually invoke it (url or slug?). The bio-return summary does not close that gap.

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 two parameters (url, slug), and the description mentions neither. An agent gets no signal on which parameter to use, whether either is required, or how slug relates to url — a meaningful gap for the only inputs this tool takes.

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 Fox News author/personality's public bio page) and the fields it returns (name, biography, recent articles). This clearly separates it from siblings like foxnews_article and foxnews_headlines, though it names no sibling 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?

There is no guidance on when to use this tool versus the other foxnews_* tools, nor any note on prerequisites or which identifier form to supply. The usage context ('to look up an author bio') is only implied by the noun phrase.

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