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

Annotations are absent, so the description carries the behavioral burden. It usefully discloses 'No disk access' and the word 'looks' signals a syntactic/heuristic check rather than real filesystem verification. However, it does not define what 'safe' means or describe the return/error behavior.

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, both informative. The core purpose is front-loaded, and 'No disk access' is a valuable behavioral qualifier with no wasted words.

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?

There is no output schema and no usage guidance, and the input schema is surprisingly broad for a tool called file-path-ok. An agent still has to guess about the response shape, which parameter to supply, and why the other parameters exist. The description does not fully compensate for these gaps.

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 even without parameter details in the description. The description adds a 'safe' security framing for the path parameter, but the schema contains nine unrelated-looking optional parameters, and the description does not explain how they relate to path checking.

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 a specific action and object: 'Check whether a path looks safe.' This distinguishes it from URL-based sibling tools. It loses the 5 because it does not explicitly name or contrast with any sibling tool.

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 choose this tool instead of alternatives like browser-url-ok, normalize-url, or wiki-title-ok. The phrase 'Check whether a path looks safe' implies a use case, but no exclusions, prerequisites, or alternative routing are provided.

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