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 useful context beyond that: the content is public, the required input shape is a canonical story URL, and the response includes metadata plus article-body paragraphs. It does not discuss rate limits, auth, or failure modes, keeping it short of a 5.

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 filler. The purpose and URL format come first, followed by the routing condition, so the most important information is front-loaded.

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 enumerated; the description still briefly notes metadata plus article-body paragraphs. Between the URL pattern, the routing guidance, and the annotations, an agent has everything needed to invoke this correctly.

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%, so the lone 'url' parameter is undocumented in the schema. The description compensates by specifying the exact canonical path pattern /stories/<section>/<slug>, which tells the agent what a valid value looks like. It still doesn't state absolute-vs-relative URL expectations, so not a full 5.

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) and resource (a public FOX Sports story) and scopes the input to the canonical /stories/<section>/<slug> URL. It is clearly distinguishable from the sibling list/feed tools (foxsports_news, foxsports_headlines), which it names directly.

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 when to use it: 'after identifying a URL in foxsports_news or foxsports_headlines.' This is a concrete trigger condition that routes the agent from discovery tools to this detail tool, with no inference required.

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