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

The description discloses that the tool performs no disk access, which is a useful behavioral safe-guard. However, it does not mention what the tool returns (e.g., boolean, error), how it handles unsafe paths, or that it discards all parameters after the check (as evidenced by the schema descriptions). With no annotations, the description carries the full burden of disclosure, and it falls short of explaining side effects, error behavior, or the result shape.

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 a single sentence that states the purpose and a key constraint. It is efficient and front-loads the essential information. However, for a tool with nine parameters, the brevity borders on under-specification rather than effective conciseness. It still earns a 4 because every word adds value, but it is not exemplary.

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?

Given the tool's complexity (nine parameters, no output schema, no annotations), the description is severely incomplete. It provides no information about the tool's return type, the meaning of 'safe', the role of the other parameters, or how the tool should be used relative to the many sibling validators. An agent cannot confidently call this tool correctly based on the description alone.

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 all nine parameters already have individual descriptions. The tool description adds no additional meaning about any parameter—it does not even explicitly name the 'path' parameter. This is a baseline 3 because the schema already covers parameter semantics, but the description provides no extra context that would help the agent understand how the parameters relate to the tool's purpose.

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 verb and resource: 'Check whether a path looks safe.' It also mentions a key constraint ('No disk access'), which distinguishes it from disk-touching tools. However, the tool's schema accepts eight other parameters (url, city, json, etc.) that the description does not mention, creating ambiguity about the tool's actual scope. The description is clear about the core purpose but not about its applicability to the other parameters.

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 offers no guidance on when to use this tool versus alternatives. It does not mention any conditions, exclusions, or sibling tools that might be more appropriate for different input types. An agent has to infer that this is for file paths based on the name and description, but there is no explicit direction. This is a significant gap given the large set of sibling validators.

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