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

With no annotations, the description carries full responsibility for transparency. It mentions 'body discarded' but fails to clarify that most schema parameters are also discarded (per their descriptions), and it does not disclose side effects like network requests, authentication, or rate limiting. The mismatch between the narrow purpose and broad parameter list misleads about actual behavior.

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 brief and front-loaded, but it omits essential details about the tool's scope and parameter roles. Conciseness is achieved at the expense of clarity, making it minimally acceptable.

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?

The tool has nine parameters, no output schema, and a description that fails to tie the parameters to a coherent purpose. It is incomplete: an agent cannot determine what to provide or what to expect beyond a vague HTTP status for a URL, leaving most of the tool's behavior unexplained.

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?

Although schema descriptions cover 100% of parameters, they primarily state that each value is 'discarded' or 'checked' without explaining their role relative to the tool's purpose. The semantic content is thin: parameters like 'city' and 'zone' are unrelated to the described HTTP-status function, so the descriptions do not effectively clarify how to use them.

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 it returns HTTP status for a 'public library docs URL', but the schema includes nine unrelated parameters (e.g., city, timezone, search text), creating ambiguity about the actual function. It does not clearly distinguish 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?

No guidance is provided on when to use this tool instead of alternatives. The description only states what it does without context or exclusions, leaving the agent without direction for tool selection.

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