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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states that a catalog exists, without mentioning what the tool does with its parameters, whether it is read-only, what output format it returns, or that most parameters appear to be 'discarded.' The schema hints at some behavior, but the description itself is silent.

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 filler, and the resource is front-loaded. However, for a tool with ten parameters and no annotations or output schema, this extreme brevity becomes under-specification rather than appropriate conciseness.

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 ten parameters, no annotations, and no output schema, the description would need to explain the role of parameters, the return value, and when to use the tool. It does none of this, leaving an agent with a severe information gap and high risk of misuse.

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?

With schema coverage at 100%, the baseline is 3, but the description adds zero meaning about parameters. More importantly, the parameters (ref, city, feed, host, json, path) seem unrelated to a status-code catalog, and the description does not resolve this mismatch. An agent cannot determine which parameters are relevant or how they affect the returned catalog.

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 names a specific resource ('short catalog of common HTTP status codes') and implies a reference/lookup operation, which is distinguishable from fetching or checking a live status. However, it lacks an explicit verb and does not clarify whether the tool returns the catalog or uses the listed parameters to filter it, so differentiation from siblings like fetch-status is only implicit.

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?

The description provides no guidance on when to use this tool versus alternatives such as web-fetch, fetch-status, or normalize-url. There is no mention of context, exclusions, or alternative tools, leaving the agent to guess the appropriate invocation scenario.

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