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

The description explicitly discloses 'No disk access,' which is a meaningful behavioral trait and helps distinguish this from filesystem-touching operations. However, with no annotations and no output schema, it does not explain what the tool returns or what criteria determine whether a path 'looks safe.' The transparency is partial rather than comprehensive.

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 extremely concise: two short sentences with the primary action front-loaded and the key constraint second. There is no filler or repetition. It borders on under-specification, but as a piece of concise writing it is well-structured and efficient.

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 nine optional parameters and no output schema, the description is too thin. It fails to define the return value, the meaning of 'safe,' or how the path parameter relates to the many other fields in the schema. An agent cannot fully determine how to invoke the tool correctly or interpret its result.

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 schema already documents all parameters thoroughly. The description does not add semantic value beyond restating the concept of checking a path, and it does not clarify whether the other eight optional parameters are relevant or ignored. Since the schema carries the load, a baseline score of 3 is appropriate.

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's function with a specific verb and resource: 'Check whether a path looks safe.' The additional note 'No disk access' adds useful scope, and the name file-path-ok reinforces the purpose. However, 'safe' is left undefined and there is no explicit contrast with sibling shape-check tools.

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 description gives no guidance on when to use this tool versus the many sibling checkers such as browser-url-ok, wiki-title-ok, or normalize-url. It only states what it does, leaving the agent to infer the appropriate context. No alternatives, exclusions, or conditions are mentioned.

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