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 states that the catalog is 'short' and 'common'. It does not disclose return format, side effects, authentication needs, or how the nine input parameters relate to behavior. This is a serious transparency gap for a tool with no structured annotation support.

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 extremely short, but this is under-specification rather than effective conciseness. It front-loads only the vague notion of a 'short catalog' and provides no actionable structure. Every word is low-information.

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 nine optional parameters, no output schema, and no annotations, yet the description explains none of these aspects. There is no indication of what the tool returns, how inputs are used, or what 'catalog' means operationally. This is incomplete for an agent to select and invoke the tool 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 schema already documents each parameter individually, including notes like 'discarded after the shape check'. The tool description adds no parameter-level meaning of its own, but the baseline of 3 applies because the schema carries the burden. The tool description's failure to connect parameters to the catalog concept is a missed opportunity but not a scoring penalty beyond baseline.

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 'Short catalog of common HTTP status codes' identifies the resource (HTTP status codes) but uses no verb and reads as a noun phrase restating the tool name. It does not specify what operation is performed, e.g. whether it returns the catalog, looks up a code, or validates a status. It also does not distinguish itself from siblings like fetch-status or browser-url-ok.

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 given about when to use this tool versus the many sibling tools. There is no mention of alternatives, prerequisites, or intended use cases. An agent is left to infer whether status-catalog is for looking up status codes, checking URL status, or something else entirely.

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