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

With no annotations provided, the description carries the full burden of behavioral disclosure, but it only says 'Short catalog'. It does not disclose what the tool returns, whether it performs network requests, whether it mutates anything, or how the parameters are used. The single sentence is far from sufficient for an unannotated tool.

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 (one sentence), but it is under-specified rather than efficiently written. It front-loads no useful information and fails to earn its place because it is misleading about the tool's actual behavior.

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 nine parameters, no output schema, and no annotations, the description is drastically incomplete. It does not explain the purpose of each parameter, how to select among them, or what the tool returns. An agent cannot reliably call this tool correctly based on the provided definition.

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 provides 100% coverage with clear descriptions for each parameter, so the baseline is 3. However, the description adds nothing about how these parameters connect to the stated purpose, and the optional nature of all parameters is unexplained. An agent cannot infer which parameter to supply to get a status code. This gap lowers the score.

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 purpose ('catalog of common HTTP status codes'), but it does not explain how the nine parameters relate to that purpose. The parameters cover URLs, JSON, timezones, file paths, etc., which appear unrelated to HTTP status codes. This is confusing and leaves the agent unable to determine what input is actually needed to get a status code.

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 (e.g., fetch-status, browser-url-ok, normalize-url). No context, no exclusions, no examples. The description gives zero information about invocation scenarios.

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