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

No annotations are present, so the description carries the full burden of behavioral disclosure. It adds one useful fact—'No disk access'—but does not explain what the tool returns, what 'safe' means, or what validation rules are applied.

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 compact and front-loaded, with no filler or repetition. Both sentences earn their place, though the brevity comes at the cost of missing useful behavioral and usage detail.

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 no output schema and no annotations, the description leaves important gaps: no return value, no explanation of the nine optional parameters' collective role, and no safety criteria. An agent would likely need to probe the tool or consult the schema further before invoking it correctly.

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 though the tool description adds no parameter detail. The description does not clarify which of the nine parameters is relevant, but the schema itself documents each field and its discard behavior.

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 uses a specific verb and resource: 'Check whether a path looks safe.' It adds a useful boundary with 'No disk access,' distinguishing it from URL- or title-focused validators. However, 'safe' is left vague, and the schema's nine unrelated parameters create some ambiguity about the actual scope.

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 versus sibling validators such as browser-url-ok or wiki-title-ok. The description implies path validation but does not state when to choose it, when to avoid it, or how it relates to alternatives.

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