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

No annotations exist, so the description carries the full burden for behavioral disclosure. It merely says the tool is a 'short catalog', implying read-only static output, but it never discloses how parameters are handled, whether output varies by input, or whether the params are discarded. The schema reveals these are discarded, but the description itself does not communicate that.

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 fluff, which makes it structurally efficient. But it is under-specified for a tool with nine parameters and no annotations; the brevity is closer to a title than a helpful description. It earns a middle score for compactness without sacrificing clarity, but misses needed content.

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?

This tool has nine parameters, no output schema, and no annotations, so the description must do heavy lifting that it does not. It never explains what an agent should pass in, what the tool will return, how the parameters are used, or how this differs from sibling status-checking tools. The description is drastically incomplete for correct invocation.

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 baseline is 3; the schema already explains each parameter. The description adds no additional meaning about how these unrelated parameters (city, feed, json, zone, etc.) relate to the catalog, but it also doesn't need to if the schema is sufficient. However, the disconnect between the catalog title and the parameters leaves semantic ambiguity.

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 ('common HTTP status codes') and calls it a 'catalog', so an agent can infer it returns a reference list. However, there is no verb like 'lists' or 'returns', no scope detail, and no differentiation from siblings such as fetch-status or browser-url-ok, so the purpose is only partially clear.

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, when not to, or how it relates to sibling tools like fetch-status or browser-url-ok. Nothing is misleading, but the description provides no context to help an agent choose this tool over alternatives.

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