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

With no annotations provided, the description carries the behavioral burden, and it does disclose a key trait: 'No disk access.' This tells the agent the tool is a purely syntactic/heuristic check with no filesystem side effects and no existence verification. It could go further by stating the return shape, but the safety-critical side-effect disclosure is genuinely valuable.

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 core purpose is front-loaded, and the important behavioral constraint 'No disk access' is isolated and easy to parse. 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 simple checker with no output schema, the description is minimally sufficient: an agent can infer that it validates path shape and is side-effect-free. However, it does not state what the tool returns, and the unusually broad 9-property input schema is not reconciled with the path-only description, leaving some ambiguity about which parameters are relevant.

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 description coverage is 100%, so every parameter already has meaningful documentation in the schema. The tool description adds no parameter-level meaning beyond naming 'path' in the purpose statement. This matches the baseline for schema-covered parameters.

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 action and resource: 'Check whether a path looks safe.' The name 'file-path-ok' reinforces that this is about file paths, distinguishing it from sibling URL and browser validation tools. It is immediately clear what the tool does and what it does not do (disk access).

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 about when to use this tool versus alternatives such as browser-url-ok, playwright-url-ok, normalize-url, or wiki-title-ok. The description gives no context for when a path-safety check is the right choice or when a URL/network-based check would be more appropriate.

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