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

With no annotations, the description must carry the transparency burden. It does disclose one relevant behavior, that page content is not stored, which is useful for a URL-inspection tool. It does not mention network side effects, redirects, timeouts, or how inputs are handled beyond the schema.

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, front-loaded with the primary action and outcome. Every phrase earns its place and there is no redundant restatement of the tool name or schema.

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?

The tool exposes nine optional parameters of very different kinds, no output schema, and no annotations, yet the description explains nothing about how those parameters relate to the URL operation. An agent is left to infer which parameters are relevant and what the tool does with the rest.

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 coverage is 100%, so the schema already documents all nine parameters, including which are discarded. The description adds only that the operation is URL-centric, which is a light confirmation rather than new parameter-level meaning.

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 names a specific output (host, scheme, and HTTP status) for a URL and adds a meaningful privacy characteristic, so an agent can tell roughly what the tool does. It does not, however, connect this to the tool name 'citation' or explicitly differentiate it from sibling tools like fetch-status or normalize-url.

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 choose this tool over the many sibling URL-related tools, nor any exclusions or prerequisites. The only contextual hint is 'Page content is not stored,' but it is not framed as a selection criterion.

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