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

There are no annotations, so the description must carry the transparency burden. The description states 'No disk access,' but that same phrase appears in the schema parameter description for 'path' and does not reveal the overall behavior across all nine accepted parameters, return semantics, or side effects. It adds little beyond the structured schema.

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?

Two short sentences, front-loaded with the core purpose and a key behavioral hint. It is concise and direct, although it is terse given the schema's breadth of nine parameters.

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?

Without an output schema or annotations, the description should clarify what result the check produces and what role the other eight parameters play. It does not, so the agent is left unsure whether the tool will validate a single named property or how it behaves when multiple fields are supplied.

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 does not add meaning beyond the schema—it only reiterates a path check and its zero-disk-behavior already captured in the parameter description. It also does not clarify the relationship between the nine accepted parameters, but the schema already describes each one adequately.

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 verb and resource: 'check whether a path looks safe.' This is clear and not a tautology. It does not explicitly contrast with sibling tools, but the name itself (file-path-ok) is distinctive among the many url/shape checker siblings, so an agent can tell what it does.

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?

No guidance is given about when to use this tool over alternatives, nor when not to use it. The only hint, 'No disk access', gives a mild safety hint but does not direct an agent to use it for path validation vs. URL validation or other sibling tools.

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