Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, openWorldHint, idempotentHint and destructiveHint, so the safety profile is covered. The description adds real value by disclosing that it 'fetches the site's pages', warning the agent of a network-dependent operation, but says nothing about latency, failure on unreachable sites, or how many prompts come back.

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 short sentences with the purpose front-loaded and no filler. The parenthetical '(fetches the site's pages)' is slightly awkward but earns its place by conveying the network behavior.

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 one-parameter, annotated tool with an output schema, the description covers what it does, how it does it, and what to do with the result. Only edge-case behavior (unreachable site, prompt count) and sibling differentiation are absent, which is minor at this complexity.

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 a single parameter at 100% schema description coverage (including an example and the 'bare domain without protocol or path' constraint), the schema fully carries parameter semantics. The description adds no additional meaning about the domain argument, so the baseline 3 applies.

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 and resource ('suggest AI-citation prompts to track') and goes further by explaining the derivation mechanism ('read off what a site says it does'). An agent knows exactly what it gets back. It does not explicitly separate itself from the similarly named citation_starter_prompts sibling, which is the one real clarity gap.

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?

The description gives a downstream workflow hint ('Use the result with create_citation_tracker'), which implies this is a seeding step. But it never states when to prefer this over the other prompt-producing sibling, nor any preconditions such as the site needing to be crawlable.

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