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

No annotations are present, so the description carries the full burden. It discloses that the body is discarded, but does not mention network calls, side effects, permissions, or how the various parameters are consumed. The broad schema is not reconciled with the stated purpose, potentially misleading the 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?

The description is concise (one sentence), but it is under-specified to the point of being unhelpful. It omits critical information about the tool's actual behavior and scope, making it too short to serve its purpose effectively.

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?

With nine optional parameters, no output schema, and no annotations, the description is grossly incomplete. It fails to explain return values, error handling, which parameters are relevant, or how the tool interacts with external resources, leaving the agent with insufficient information.

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 each parameter already has a clear description, earning a baseline of 3. However, the tool description adds no context on how parameters relate to the stated purpose; the mismatch between the URL-specific description and unrelated parameters reduces its value.

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 verb and resource ('HTTP status for a public library docs URL'), but the input schema includes nine unrelated parameters (city, feed, json, path, zone, query, etc.), making the tool's actual purpose ambiguous. It does not differentiate from siblings like fetch-status or browser-url-ok, and the mismatch between description and schema confuses an agent.

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 many sibling tools. No context, alternatives, or exclusion criteria are provided. The description is a single declarative sentence that offers no decision support.

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