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

The description discloses that no disk access occurs, which is useful behavioral information, especially given no annotations are provided. However, it does not explain return values, error behavior, or whether the check is purely syntactic or heuristic, leaving important behavioral aspects unspecified.

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 very brief and avoids unnecessary words; both sentences contribute meaning. The structure is not elaborate, but for such a short description it is appropriately sized and front-loaded with the core action.

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?

The description is incomplete in context: no output schema exists, no return type is mentioned, and the tool's relationship to its nine parameters is unexplained. The large set of irrelevant parameters makes the tool contextually confusing rather than self-contained.

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?

Although every parameter has a description, most are unrelated to the tool's stated purpose. The schema includes ref, url, city, feed, host, json, zone, and query, while only 'path' aligns with 'file-path-ok.' This mismatch is misleading and severely undermines parameter semantics.

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 the tool checks whether a path 'looks safe' and explicitly says 'No disk access,' giving a basic sense of purpose. However, 'looks safe' is vague and does not specify what safety criteria are used (e.g., traversal, absolute path, syntax), leaving the exact purpose ambiguous.

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 on when to use this tool versus alternatives. It does not mention scenarios, prerequisites, or contrast with sibling tools like browser-url-ok or domain-shape, so an agent has no basis for selecting it over other validators.

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