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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It only states 'No disk access,' which is a useful safety note, but it fails to explain what constitutes a 'safe' path, what the return value looks like, whether it is read-only, or any side effects. This is insufficient for a tool that performs validation.

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 extremely concise, two short sentences, and front-loads the primary action. It is efficient but arguably too sparse to be helpful. Still, as a conciseness metric, it earns a 4 for zero redundancy.

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 9 parameters, no required fields, no output schema, and no annotations, the description is woefully incomplete. It does not explain the tool's full behavior, how to invoke it for different parameter types, what results to expect, or how it relates to the broader toolset. This is a serious deficiency for an agent that must decide when and how to call it.

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 the schema descriptions are clear and coverage is 100%, the tool description only mentions 'path' and ignores the other 8 parameters. This creates confusion about whether the tool also validates refs, URLs, JSON, etc., and under what circumstances. The description does not explain how to use the tool for non-path inputs, so it fails to compensate for the schema's breadth.

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 the tool's purpose: checking whether a path looks safe, with a specific verb and resource. It distinguishes this from siblings like browser-url-ok or domain-shape, which focus on URLs or domains. However, the description doesn't clarify why the schema includes 9 unrelated parameters, which slightly muddies the core purpose.

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 provided on when to use this tool versus alternatives. The description does not mention any exclusions, prerequisites, or conditions that would lead an agent to choose this tool over others. Given the long sibling list, this absence is a notable gap.

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