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 mentions 'Body discarded' which gives a small hint, but it does not explain what happens with the other parameters (e.g., city, zone, json), what the output format is, whether any network calls are made beyond the URL check, or any side effects. The description contradicts the parameter breadth, implying only URL handling when the schema suggests a multi-purpose hint tool. 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 extremely concise: two sentences with no filler. It front-loads the primary purpose ('HTTP status') and includes a note about body handling. However, the brevity contributes to under-specification, so while it is structurally concise, it is not adequately informative. It earns a 4 for efficiency but loses a point for lack of substance.

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 9 optional parameters, no annotations, and no output schema, yet the description provides only a one-line purpose. It does not explain return values, how to choose which parameter to provide, what happens if multiple are given, or any operational constraints. The description is completely inadequate for an agent to call this tool correctly in any non-trivial scenario.

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. The description adds no parameter-specific meaning; it only mentions the URL indirectly. Worse, it could mislead an agent into ignoring the other parameters because it only talks about HTTP status for a URL. The description does not compensate for the fact that many parameters (city, zone, json) are unrelated to HTTP status, and it fails to clarify how they are used.

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 states a specific action: return HTTP status for a public library docs URL. This is clear and uses a verb+resource structure. However, it does not align with the broad set of 9 unrelated parameters (city, zone, json, etc.), which creates ambiguity about the tool's actual scope and may mislead an agent into thinking only 'url' matters. It also does not differentiate 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 no guidance on when to use this tool versus alternatives. It does not mention any exclusions, prerequisites, or scenarios where a sibling tool would be preferred. The description is silent on usage context, leaving the agent to guess based solely on the name and parameters.

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