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

With no annotations, the description carries the full burden; 'No disk access' is a useful explicit disclosure that this is a pure validation call. But it omits what counts as 'safe', whether it returns a boolean or error, and what happens with the other schema parameters.

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?

Two short sentences with no fluff and the key safety behavior front-loaded in the second sentence. The wording is efficient, though 'looks safe' is vague enough to keep it from being a perfect structural model.

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?

For a tool with no output schema, no annotations, and nine schema properties, this description is under-specified. It does not explain the return format, which parameter to pass, or why unrelated parameters like `url`, `city`, and `zone` are present, so an agent cannot reliably 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?

Schema description coverage is 100%, so the baseline is 3; each parameter already has its own description. The tool description itself adds no parameter-level meaning and never points to `path` as the primary input beyond the tool name.

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 identifies a specific verb ('Check') and resource ('whether a path looks safe') and adds a distinguishing constraint ('No disk access'), which separates it from URL or filesystem-access siblings. However, 'safe' is not defined, and the schema's many unrelated parameters slightly obscure the intended target.

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 given about when to choose this tool over alternatives like browser-url-ok, normalize-url, or github-repo-shape. 'No disk access' implies it is appropriate for purely syntactic checks, but no explicit when/when-not conditions are provided.

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