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

With no annotations, the description must carry side-effect disclosure, and it does at least state 'No disk access.' However, it does not disclose the return type/format, what criteria make a path 'safe,' or that all nine schema properties are optional and mostly discarded.

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 definition is short and front-loaded, but it is under-specified for a tool whose schema exposes nine optional parameters. 'No disk access' is useful, yet the brevity leaves key operational meaning unstated.

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 validator with no output schema, no required parameters, and no annotations, the description omits the result shape and the disambiguation of which parameter matters. The agent has to infer too much to invoke this 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. The description connects the tool to the 'path' property but adds little beyond that; the schema already documents each accepted parameter and the discard behavior.

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 names a specific action ('Check') and resource ('path'), and the qualifier 'No disk access' clarifies this is a pure validation rather than filesystem I/O. It does not fully define what 'looks safe' means, so it is not a 5.

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 sibling validators such as browser-url-ok, domain-shape, or wiki-title-ok. The sentence only implies disk-free validation; it never states explicit conditions or alternatives.

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