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

With no annotations, the description carries full responsibility for transparency. It accurately describes the network operation (HEAD request), the scope (public URL), and the limited return (status only), which is honest and sufficient for an agent to understand side effects.

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, concise sentence with no extraneous words. It front-loads the essential information (method, target, return) and is perfectly efficient.

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 description clearly states the core function, but it does not address the unusual mix of unrelated parameters (city, zone, query, etc.) in the schema. An agent might be uncertain why those parameters exist, though the schema descriptions partially compensate. Overall context is adequate but not fully complete.

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 descriptions cover 100% of parameters, each with a clear purpose. The tool description itself adds no parameter-specific guidance, but the schema already provides adequate semantics, so the baseline of 3 is appropriate.

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 clearly states the action (HEAD), the target (public URL), and the exact output (status only). This distinguishes it from content-fetching tools like web-fetch, and the verb 'HEAD' is precise.

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 implies usage for public URLs and status-only needs, but it does not explicitly state when to prefer this over similar siblings like browser-url-ok or playwright-url-ok, nor does it mention any alternatives or exclusions.

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