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

With no annotations, the description carries the behavioral disclosure burden. It discloses only that page content is not stored, while leaving unclear whether the tool makes a live network request, follows redirects, requires any auth, or has rate limits. The one disclosed trait is useful but incomplete.

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 primary behavior front-loaded and no filler. The second sentence adds a meaningful privacy fact.

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 9-parameter tool with no output schema and no annotations, the description is too thin. It omits when to use it, what the non-URL parameters do in relation to the tool, and how returned status information is formatted or produced.

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?

Input schema coverage is 100%, so the schema already documents each parameter; the description adds little beyond indicating that the tool operates on a URL. The many other parameters (ref, city, feed, json, path) are not reconciled with the stated purpose, but the baseline is still met.

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?

The description states a concrete action and result: return host, scheme, and HTTP status for a URL. It is clear about the resource and output, though it does not distinguish itself from sibling tools like fetch-status or normalize-url, and the name 'citation' is not reflected in the described behavior.

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 choose this tool over fetch-status, normalize-url, or browser-url-ok. 'Page content is not stored' hints at a privacy use case, but the description never says when to use the tool or when not to.

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