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

No annotations are provided, so the description carries the full burden. It does disclose 'No disk access,' which is a useful safety property, but it omits the return format, error behavior, and what constitutes a 'safe' path. For a validation tool, this is insufficient transparency.

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, which is concise but far too terse for a tool with 9 parameters and no output schema. It lacks necessary context and structure, sacrificing completeness for brevity.

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?

With 9 parameters, no output schema, and no annotations, the description is severely incomplete. It doesn't explain the return value, the meaning of 'safe', or the role of the additional parameters. Agents cannot reliably invoke this tool 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%, providing descriptions for all 9 parameters, so baseline is 3. However, the description fails to explain how the many unrelated parameters (ref, url, city, feed, host, json, zone, query) relate to the stated single purpose of checking a file path, leaving agents confused about which parameter to use. This undermines the usefulness of the schema descriptions.

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 the tool checks whether a path looks safe and explicitly notes 'No disk access,' giving a clear verb and resource. However, it does not define what 'safe' means or differentiate from sibling tools like browser-url-ok or domain-shape, so the purpose is only partially clear.

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 the 27 sibling tools. No mention of alternatives, exclusions, or typical use cases, leaving the agent without decision support for selection.

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