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

No annotations are provided, so the description must carry the full burden. It only says 'catalog' which implies read-only, but it does not disclose whether it makes network calls, what side effects exist, or how it handles the various input parameters. The parameter descriptions hint at shape-checking behavior, but the tool description fails to explain this.

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 sentence with no fluff, making it efficient. However, it is under-specified, which affects completeness rather than conciseness. The front-loading is minimal but appropriate for the little content it has.

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 9 optional parameters and no output schema, yet the description provides no explanation of how these parameters are used, what the output looks like, or how it relates to the catalog. The lack of any behavioral or usage detail makes it severely incomplete for an agent to call 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?

Schema description coverage is 100%, so the baseline is 3. The tool description adds no additional meaning about the parameters; it does not explain why a catalog of status codes accepts URLs, city names, or timezones. The schema descriptions are self-contained but the tool-level description offers no extra context.

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 clearly states that the tool provides a catalog of common HTTP status codes, which is a specific resource. It is distinguishable from siblings like 'fetch-status' which likely retrieves a live status, though it does not explicitly differentiate itself from other catalog-like tools.

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, prerequisites, or exclusions. The purpose implies it could be used for reference, but nothing explicit is stated.

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