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

With no annotations, the description carries the full burden of behavioral disclosure. It merely offers a static catalog description, giving no indication whether the tool reads data, performs lookups, validates input, or mutates anything. Given that the schema includes fields like 'json' (to validate) and 'url' (to normalize), the behavioral ambiguity is significant and could mislead an agent.

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?

A single short sentence is concise, but it lacks useful substance. It provides no action or context, so it is under-specified rather than truly efficient. There is no wasted text, yet the brevity severely limits utility.

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?

For a tool with 4 parameters, no required fields, no output schema, and no annotations, the description is too thin. An agent cannot tell what happens when it passes a URL, a host, or a zone. The phrase 'catalog of HTTP status codes' does not bridge the gap between these parameters and the tool's purpose.

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 has complete descriptions for all four parameters, so baseline 3 applies. The description itself does not enrich parameter meaning, but it also does not need to because the schema coverage is 100%. However, the catalog description gives no hint of how the parameters relate to HTTP status codes.

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 says the tool is a 'short catalog of common HTTP status codes,' which names a resource but lacks a verb. It does not state what action the agent can take with this catalog (look up? cite? normalize?), so a caller cannot tell what invoking the tool actually does. The sibling names (citation, compatability) do not appear in the description, nor is there any clarifying reference to them.

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 on when to use this tool vs. any alternative. No mention of scenarios, exclusions, or alternative tools exists in the description. The description serves as a label, not a usage guideline.

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