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

No annotations are present, so the description must carry the full behavioral burden. It discloses that page content is not stored, which is useful, but it does not mention whether a network request is made, whether there are side effects, or any permissions/rate-limit context.

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 with no filler. The main behavior is front-loaded and the non-storage statement earns its place as a privacy-oriented behavioral note.

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?

With 9 parameters and no output schema, this description is too sparse to be complete. It does not explain how the extra parameters relate to the tool, what the response shape is beyond three fields, or when this tool should be selected over fetch-status or normalize-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?

The schema already provides descriptions for all 9 parameters, so the baseline is 3. The tool description adds no new parameter meaning and only reinforces the url parameter while ignoring the other eight, which remain confusingly justified by schema text alone.

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 specific behavior: return host, scheme, and HTTP status for a URL. It is clear, but it does not explicitly differentiate this from closely related siblings like fetch-status or normalize-url, whose purposes overlap with these outputs.

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 guidance is given about when to use citation versus a sibling tool. The line 'Page content is not stored' faintly implies this is not for content retrieval, but there are no explicit conditions, alternatives, or exclusions.

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