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

No annotations are present, so the description carries the full burden of behavioral disclosure. It fails to mention side effects (e.g., network calls, disk access), whether inputs are discarded, or what the tool returns. The parameter descriptions in the schema note 'discarded after...' but the tool description itself gives no behavioral information.

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 short sentence, but it is under-specified rather than concise. It omits essential operational details and fails to front-load any actionable information. A 1-2 word description could be considered concise, but here the brevity is a symptom of incompleteness, not efficiency.

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?

With 9 optional parameters, no output schema, and no annotations, the description must compensate by explaining what the tool does, how to call it, and what it returns. It does none of this. The tool appears to be a status/validation check, but the description's mention of a 'catalog' leaves the agent guessing about the tool's actual function and return value.

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 baseline is 3. The schema already provides clear per-parameter descriptions (e.g., 'Git ref name; discarded after the shape check'), so the tool description adds no additional parameter meaning. It neither clarifies how parameters interact nor explains the role of the catalog relative to the inputs.

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 is a noun phrase ('Short catalog of common HTTP status codes') rather than a verb+resource statement. It doesn't say what the tool does with its 9 optional parameters, nor does it distinguish itself from siblings like fetch-status or the many shape-check tools. The varied parameters (url, city, json, path, etc.) with 'discarded after...' hints suggest a generic validation/status tool, but the description never states that.

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?

No guidance is provided on when to use this tool versus alternatives. There is no mention of use cases, exclusions, or preferred contexts. An agent has no idea whether to call this or fetch-status, domain-shape, or other siblings.

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