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

With no annotations provided, the description carries the behavioral burden; it does disclose the key trait that no disk access happens. It does not state the return value, error behavior, or what exactly counts as 'safe', leaving important expectations 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?

Two terse sentences with no filler, and the most important qualification, 'No disk access', is front-loaded immediately after the purpose. Every word earns its place.

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 and schema do not fully align: the tool claims to check path safety, yet the schema exposes eight unrelated optional fields, and there is no output schema or definition of 'safe'. An agent can infer a basic call, but the definition is incomplete for confident correct use.

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; the tool description adds no parameter-level meaning beyond indicating that the checked resource is a path. The schema's many extra optional parameters such as url, city, zone, and query are individually documented, but their relationship to this tool is not explained.

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 names a specific operation: checking whether a path looks safe, and adds that no disk access occurs. It distinguishes the tool from URL/domain/wiki validators, though 'looks safe' is left vague and the input schema exposes many unrelated optional 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?

'No disk access' implies this is a lightweight, side-effect-free preflight check, which is useful context. However, the description does not explicitly state when to prefer this over sibling tools such as browser-url-ok or domain-shape, nor does it give exclusions.

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