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

With no annotations provided, the description carries the full burden of explaining behavior. It discloses only that there is no disk access and that the check is about appearance ('looks safe'), but it does not state return values, failure behavior, or side effects.

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 main description is concise and front-loaded, with no filler. However, it is almost too sparse given the unusual parameter list, though conciseness itself is strong.

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 tool has nine optional parameters, no output schema, and no annotations. The description fails to explain what 'safe' means, what result the caller should expect, what the additional parameters do, or how this tool relates to the many sibling validators. This is incomplete for a tool of this apparent complexity.

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 schema description, most are unrelated to path safety (e.g., 'url', 'city', 'feed', 'json', 'zone'). Only 'path' clearly aligns with the tool's purpose, and the description does not explain why the other eight optional parameters exist or how they are used.

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 a clear action and resource: 'Check whether a path looks safe.' It is distinct from the sibling validators by name, though the description alone does not explicitly contrast it with similar *-ok 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?

There is no guidance on when to use this tool versus sibling validators such as browser-url-ok or domain-shape. The only behavioral note is 'No disk access,' which does not explain selection criteria or expected use cases.

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