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

The description notes that the body is discarded, suggesting a read-only status check, but it does not disclose any other side effects or guarantee that the operation is non-destructive. With no annotations, this level of detail is insufficient.

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 a single sentence, which is concise, but it omits essential context about the parameters and expected usage, making it too sparse to be considered well-structured for a tool with nine optional inputs.

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 no output schema and a description that only mentions HTTP status, the tool's behavior for the other parameters and its return format remain undefined, leaving the context incomplete for an agent to invoke it 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?

While each parameter has a description, they reference unrelated domains (e.g., city, timezone, search text) that do not align with checking HTTP status. The tool description does not explain how these parameters are used, so the semantic coherence is poor.

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 the tool returns HTTP status for a URL, which is a clear verb+resource combination. However, the tool name 'lib-docs-hint' and the unrelated parameters introduce ambiguity about the actual scope.

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?

The description provides no guidance on when to use this tool instead of alternatives like fetch-status or browser-url-ok, nor does it explain how to select among the nine optional parameters.

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