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 only states that the catalog is 'short,' without saying whether the tool returns data, makes network calls, has side effects, or ignores its inputs. The schema hints that several parameters are discarded, but the description does not confirm this behavior.

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 with no wasted words. However, it is so terse that it is nearly a restatement of the tool name, and it lacks the structural details needed to be genuinely informative.

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 no output schema, no annotations, seven loosely related optional parameters, and a large sibling tool set, the description is too thin. An agent cannot confidently determine what inputs matter, what the tool returns, or how it differs from nearby status-related tools.

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 input schema already describes each parameter individually, so schema coverage is high and the baseline is 3. The tool description adds no meaning about how ref, url, city, feed, host, json, or path relate to an HTTP status catalog, but the schema at least documents each parameter's stated intent.

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 the resource ('catalog of common HTTP status codes') but uses no verb, so it is not clear whether the tool lists, looks up, or validates status codes. It is close to a tautology of the tool name and does not distinguish itself from sibling tools like fetch-status.

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 about when to use this tool versus alternatives such as fetch-status or normalize-url. The description gives no context, prerequisites, or exclusions, leaving the agent to guess.

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