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

No annotations are present, so the description carries the disclosure burden. 'No disk access' explicitly states a key behavioral boundary, and 'looks safe' implies a pure syntactic/shape check. However, it does not say whether the tool ever reads any input, returns a boolean, or has any edge-case caveats.

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 two short sentences with no filler. It front-loads the function and immediately states the important non-side-effect behavior. 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 tool is more complex than the description implies: its schema accepts seven largely unrelated inputs (ref, url, city, feed, host, json, path), yet the description only talks about paths. It does not explain which parameter to use, what happens with the others, or why this differs from the related sibling tools. This leaves agents without enough context to call 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?

The input schema provides rich descriptions for all parameters, including notes about discarded values, so schema coverage is high. The description itself adds no extra parameter meaning and only mentions 'path', leaving the relationship between the other six parameters and the path-focused purpose unexplained.

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, specific purpose: 'Check whether a path looks safe.' This distinguishes it from URL-focused siblings like browser-url-ok and normalize-url by using 'path', but 'looks safe' is vague and does not define what safety criteria are checked.

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 about when to prefer this tool over alternatives. It does not reference the sibling tools or explain why file-path-ok should be chosen instead of normalize-url, browser-url-ok, or validate-json when the input schema also accepts URL and JSON parameters.

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