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

No annotations are provided, so the description must carry the behavioral disclosure burden. It does add a meaningful guarantee that page content is not stored, suggesting a non-persistent read operation. However, it does not disclose whether a live HTTP request is made, how redirects, errors, or timeouts are handled, or any external side effects.

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?

The description is only two sentences with no filler. The main outcome is front-loaded, and the second sentence adds a relevant behavioral caveat. Every word earns its place, even though broader guidance is missing.

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 network-related tool with 9 optional parameters, no annotations, and no output schema, this description is too sparse. It omits return-value shape, parameter selection guidance, error/redirect behavior, and how this tool relates to sibling URL/status tools.

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 100%, so the schema already documents all 9 parameters. The description adds no extra parameter semantics beyond referring to 'a URL,' and it does not clarify which of the many optional parameters should be used for the stated behavior.

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 operation: 'Return host, scheme, and HTTP status for a URL.' This gives a clear verb and resource. However, it does not differentiate the tool from siblings like fetch-status or normalize-url, and the name 'citation' is not tied to 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 about when to use this tool over the many related siblings such as fetch-status, normalize-url, browser-url-ok, or web-fetch. No conditions, exclusions, or alternative choices are mentioned. 'Page content is not stored' is a privacy property, not a usage rule.

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