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

With no annotations provided, the description correctly adds an important behavioral fact: no disk access, meaning this is a pure syntactic check without filesystem side effects. However, it does not clarify what 'safe' means, whether any network access occurs, or what the tool returns, leaving some behavioral ambiguity.

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 front-loaded purpose and no filler. Every word contributes, making it appropriately concise for a simple validation tool.

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 and no annotations, the description is too sparse. It does not state what the check returns, how to treat the nine optional schema parameters, or what criteria define a 'safe' path. The no-disk-access note helps, but the agent still lacks enough context to invoke the tool confidently.

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?

All nine parameters already have descriptions in the schema, so the description itself adds no parameter-level meaning. It mentions only 'path' while the schema contains many unrelated optional parameters, so the schema carries the semantic weight for parameter interpretation.

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 purpose: checking whether a file path looks safe, with a useful scope qualifier ('No disk access'). It is clear about the resource and action, though it does not explicitly distinguish itself from sibling validators like browser-url-ok or domain-shape.

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 purpose sentence implies this tool is for path-safety checks, but there is no explicit when-to-use or when-not-to-use guidance, and no mention of alternatives among the many similar 'ok' and 'shape' tools. The no-disk-access note hints at safe usage but does not provide selection criteria.

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