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

With no annotations at all, the description carries the full burden, but it only says the catalog is 'short.' It does not disclose whether the call is read-only, what the response contains, whether the parameters are ignored, or whether inputs are transformed or discarded (the json parameter itself says 'discarded after the check,' which is not reflected in the description).

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 front-loaded sentence with no filler, so it scores well on conciseness. However, it is so short that it sacrifices substance; this is reflected in other dimensions.

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 four optional parameters, no annotations, and no output schema, yet the description only gives a noun phrase. It omits expected behavior, return value, invocation semantics, and how the four parameters relate to the tool's purpose, making it inadequate for correct 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?

Although the input schema provides 100% description coverage, those descriptions ('normalize or cite', 'validate; discarded after the check', 'IANA timezone name') describe different operations than a status-code catalog. The main description adds no mapping between the parameters and the stated purpose, so the agent cannot choose which parameter to populate.

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 repeats the tool name almost verbatim ('Short catalog of common HTTP status codes' vs 'status-catalog') and uses no verb to say what the tool does when called. It names a resource, but the input schema of url/host/json/zone is unrelated to status codes, so an agent cannot tell what operation this tool performs.

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 about when to use this tool versus its siblings (citation, normalize-url, validate-json, timezone, etc.) or when not to use it. There are no exclusions, prerequisites, or examples.

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