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 story must be public and that it returns metadata plus article-body paragraphs, but with a rich output schema already present, it contributes little additional behavioral transparency.

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, zero waste, and the core action is front-loaded ahead of the usage note. Every clause earns 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?

For a simple, read-only, single-parameter fetch tool with a full output schema and clear annotations, the description supplies everything needed: what it fetches, the expected URL shape, and where to obtain the URL.

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 100% and the single parameter is documented as a canonical FOX Sports story URL. The description goes beyond the schema by giving the concrete path pattern /stories/<section>/<slug>, which helps the agent construct a valid input.

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 (Fetch), resource (public FOX Sports story), scope (public), and canonical URL shape. It also names foxsports_news and foxsports_headlines as the feeder tools, which distinguishes it from sibling article tools like foxnews_article.

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?

Explicitly says to use it after identifying a URL in foxsports_news or foxsports_headlines, giving a clear workflow context and naming the sibling tools. It does not, however, state any when-not-to-use conditions or exclusions.

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