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 that the return includes profile, biography, and recent articles, which is useful content scope, but says nothing about pagination, freshness of articles, or error behavior for invalid URLs.

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?

Two sentences, no waste. The content scope is front-loaded and the input requirement follows immediately.

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 values need not be explained, and annotations cover the read-only/open-world profile. The remaining gap is the absence of any routing guidance relative to the many sibling Sky Sports tools, which an agent must infer.

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?

With only one parameter at 0% schema description coverage, the description carries the burden and delivers: it specifies the input must be a 'canonical HTTPS author page URL', clarifying both format (HTTPS) and source (the author's canonical page), which the bare 'url' string schema does not convey.

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 (Retrieve) and resource (Sky Sports author's public profile, biography, and recent articles), which unambiguously distinguishes it from siblings like skysports_article, skysports_headlines, and skysports_news that return different content types.

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 explicit guidance on when to use this tool versus skysports_article or other Sky Sports endpoints, nor any prerequisites or exclusions. The only implicit hint is the requirement to supply a canonical author URL.

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