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

With no annotations, the description carries the full burden of behavioral disclosure. It does add the useful trait 'No disk access,' indicating a heuristic, non-destructive check. But it does not disclose the return format or that the tool accepts and discards several other parameter types; the schema hints at this via 'discarded' notes, but the description itself is too thin.

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 appropriately short—two sentences with the core action front-loaded and a safety qualifier second. There is no wordiness, but the brevity comes at the cost of omitting meaningful context about the broader schema.

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?

Given nine optional parameters, no output schema, and no annotations, a complete description would explain that this is a shape-checking utility for multiple input kinds and what the result indicates. The current description only addresses path safety and leaves the agent unsure about how to use the other fields or interpret the response.

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 input schema already provides 100% coverage with descriptions for all nine parameters, so the baseline is 3. The description adds no parameter-level insight; it only mentions 'path' and does not clarify how the multiple optional parameters relate to each other or which should be supplied.

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 ('Check whether a path looks safe') and adds a non-destructive caveat. However, the input schema accepts eight other unrelated string types (url, city, feed, host, json, zone, query), none of which are mentioned, so the description covers only one aspect of the tool and does not fully distinguish its scope from sibling tools like domain-shape 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?

There is no guidance on when to use this tool versus alternatives. The two sentences do not mention conditions, excluded cases, or reference any of the sibling tools, leaving an agent without direction on selecting file-path-ok over similar shape-checking utilities.

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