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

With no annotations and no output schema, the description carries the full burden of explaining behavior, but it only states what the catalog contains, not what the tool does with the supplied parameters. It does not mention whether the tool reads, checks, transforms, returns data, or has side effects; the schema hints at validation and normalization but this is never disclosed.

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 and grammatically simple, which is efficient. It front-loads the core noun phrase, though it wastes a little space on the word 'short' and does not use the brevity to clarify the tool's purpose or parameter relationships.

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 four heterogeneous parameters, no annotations, and no output schema, a one-line noun phrase is severely inadequate. An agent cannot determine what inputs mean, what outputs to expect, or how this relates to HTTP status codes, making the description effectively non-actionable.

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 schema provides 100% coverage with individual descriptions for each parameter, so the baseline is 3. However, the tool description itself adds no parameter-level meaning, and the gap between 'HTTP status codes' and parameters like 'zone' or 'json' is unexplained, slightly undermining the schema's clarity.

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 essentially a noun phrase restating the tool name: 'status-catalog' becomes 'catalog of common HTTP status codes'. It lacks a specific action or verb, and the input schema (url, host, json, zone) has no obvious relationship to a catalog of HTTP status codes, making it harder for an agent to infer what invoking this tool actually does.

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 the sibling tools 'citation' and 'compatibility'. The description provides no context about typical use cases, prerequisites, or conditions under which this tool should be preferred, leaving the agent to guess.

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