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

No annotations are provided, so the description carries the full burden. It discloses that page content is not stored, which is a useful privacy note. However, it does not mention that the tool likely makes network requests, how it handles errors, whether it is read-only, or any other behavioral traits. The single transparency note is insufficient for a tool with no annotation support.

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 concise, with two short sentences. The core purpose is front-loaded, and there is no redundancy. However, the extreme brevity may under-specify behavior, but that is a completeness issue rather than a conciseness issue. The structure is clean and efficient.

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?

Given the tool has 9 optional parameters, no required fields, no output schema, and no annotations, the description is severely incomplete. It explains only a small fraction of the tool's behavior and leaves the relationship between the parameters and the stated purpose unexplained. An agent cannot confidently decide how to invoke this tool correctly.

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 descriptions cover 100% of parameters, so the baseline is 3. However, the tool description does not add meaning beyond the schema—it does not clarify which parameters are relevant to the stated URL-focused purpose. Many parameters (city, feed, json, path, zone, query) appear unrelated to 'host, scheme, and HTTP status,' and the description offers no guidance on how to interpret or use them, making the tool's interface confusing.

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 action: returning host, scheme, and HTTP status for a URL. However, it does not distinguish this tool from siblings like fetch-status or normalize-url, and it does not explain how the nine optional parameters (city, feed, json, path, zone, query, etc.) relate to the stated purpose. This leaves the tool's actual scope ambiguous.

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 on when to use this tool versus any of the many siblings. It does not mention conditions, exclusions, or alternatives. An agent has no information about when this tool is preferable to fetch-status, normalize-url, or browser-url-ok.

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