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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description adds a useful concrete behavioral detail: 'No disk access.' This goes beyond the annotations by clarifying the check is purely lexical/shape-based, but it does not disclose what happens for an unsafe path, return values, or whether any normalization occurs.

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 two short sentences with no filler: the first states the purpose and the second adds a critical behavioral constraint. It is front-loaded and every word earns its place.

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 seven schema parameters, only one of which matches the described 'path' concept, the description is notably incomplete. It fails to clarify whether the other parameters are alternatives, optional, or irrelevant, and with no output schema it also leaves the expected return value unspecified.

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 provides descriptions for all seven parameters, including 'File path to check' for path, so schema coverage is high. The description does not add any parameter-level meaning beyond the schema, especially problematic because the schema includes many unrelated fields (ref, url, city, feed, host, json) that the description does not explain or reconcile with 'path.'

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 tool checks whether a path looks safe, using a specific verb ('check') and resource ('path'). However, it does not explicitly distinguish itself from sibling shape-checkers such as browser-url-ok or domain-shape, and the broad term 'looks safe' leaves the exact validation scope slightly vague.

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 phrase 'No disk access' implies this is the right tool when a static, non-filesystem-touching path validation is needed, which gives some usage context. However, it does not explicitly state when to prefer this over alternatives, nor does it mention any exclusions or conditions.

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