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 reveals that the catalog is 'short' and limited to 'common' codes. It does not explain what happens when the tool runs, what it returns, or why it accepts url, host, json, and zone parameters that are unrelated to HTTP status codes. This is a significant transparency gap.

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 only five words and front-loaded, but this is under-specification, not conciseness. Given four parameters that appear unrelated to the stated purpose and no usage or behavior guidance, the description is far too sparse to earn high marks for appropriate sizing.

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 no annotations and no output schema, the description is inadequate for correct invocation. It doesn't clarify what inputs to provide (all four parameters are optional and domain-mismatched to a status-code catalog), what triggers a useful call, or what the agent can expect back. An agent would struggle to select and call this 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 (url, host, json, zone) with a one-line meaning, earning the baseline of 3. The description adds no parameter information at all, but it also doesn't need to for basic semantics; however, the parameters' relationship to the described purpose is left unexplained.

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 identifies the domain resource ('common HTTP status codes') and is distinguishable from the clearly different sibling domains (citation, timezone, validate-json). However, it lacks an action verb — it doesn't state whether the tool returns a list, a definition, or a lookup result — and 'catalog of ... status codes' largely restates the tool name 'status-catalog', though the added 'HTTP' and 'common' provide some scoping.

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 versus alternatives such as citation, compatibility, normalize-url, timezone, or validate-json. No context, prerequisites, or exclusions are given. An agent must infer use entirely from the name and sibling list.

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