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

No annotations exist, so the description carries the full burden. It discloses no behavior: no side effects, no return format, no security or permission requirements, no indication of what happens with the input values. The only hint is from parameter descriptions mentioning 'discarded after the shape check,' but the tool 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 short sentence, but it is under-specified rather than concise. It omits essential information and fails to front-load any actionable guidance. The brevity is not a virtue here.

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 9 parameters, no output schema, and no behavioral hints, the description is grossly incomplete. An agent cannot determine what the tool returns, how parameters are used, or why it exists. This is far below the minimum viable level for a tool of this complexity.

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 coverage is 100% with detailed per-parameter descriptions, but the tool description adds nothing to clarify why these 9 unrelated parameters belong to a 'catalog of HTTP status codes.' The description does not bridge the gap between the schema and the stated purpose, so it adds no meaningful semantics.

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 is a noun phrase ('Short catalog of common HTTP status codes') rather than stating an action. It doesn't specify what the tool does with the given parameters, and the parameters (url, city, host, etc.) bear no obvious relation to HTTP status codes. It also doesn't distinguish itself from sibling tools 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?

There is zero guidance on when to use this tool or when to prefer an alternative. No context about prerequisites, limitations, or typical scenarios is provided.

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