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

With no annotations, the description carries the behavioral disclosure burden. It does disclose that the body is discarded and limits the tool to public URLs, which is useful. But it does not mention network side effects, redirect behavior, error handling, authentication concerns, or how invalid inputs behave.

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 tight, front-loaded, and has no filler. It is not rated 5 because a two-sentence description is somewhat under-sized relative to the complexity of a nine-parameter tool with no output schema, but every sentence does meaningful work.

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 description names the return focus and the body-discard behavior, but it does not explain how the nine optional inputs map to the core operation or which one should be provided. Since there is no output schema and no annotations, the agent receives too little to reliably invoke the tool across its various inputs.

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 each parameter already has a description and the baseline is 3. The tool description itself adds no parameter-level meaning and even coexists oddly with parameters such as city, path, zone, and query, whose descriptions are not clearly tied to the stated HTTP-status purpose.

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 resource: returning HTTP status and content type for a public URL, and it adds the notable behavior 'Body discarded.' However, it does not directly distinguish itself from close siblings like fetch-status or browser-url-ok, and the nine unrelated optional inputs create some selection ambiguity.

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 explicit guidance about when to use this tool versus alternatives such as fetch-status, normalize-url, or browser-url-ok. 'Public URL' and 'Body discarded' imply a use case, but no when-not-to-use conditions or sibling routing are given.

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