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

With no annotations, the description carries the behavioral burden, and it does useful work by specifying HEAD (no body retrieval), public URLs only, and status-only output. It leaves some details unstated, such as redirects or error behavior, but the safety-relevant read-only nature is clear.

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 a single eight-word sentence with no filler. The verb, target, and output are front-loaded and every word contributes meaning.

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 has no annotations, no output schema, and an unusually broad parameter surface (url plus ref, city, feed, host, json, path). The description covers only the url-based HEAD case and leaves unanswered how the other parameters fit, whether any are required, and what 'status' means in the response, so it is not complete enough for reliable invocation.

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 documents all seven parameters with individual descriptions, so the baseline is 3. The description adds the 'HEAD URL' framing that helps identify `url` as the relevant parameter, but it does not clarify how the many 'discarded' parameters relate to the tool's purpose or which ones can be used together.

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 HTTP verb (HEAD), a target (public URL), and the outcome (status only), so the core purpose is clear. It does not explicitly contrast with sibling tools like web-fetch or status-catalog, so it stops short of top-tier differentiation.

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?

The phrase 'status only' implies a lightweight reachability check where content is not needed, which gives some usage signal. However, the description never states when to prefer this tool over web-fetch, browser-url-ok, or status-catalog, nor does it name exclusions.

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