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

With no annotations, the description carries the behavioral burden, and 'No disk access' is a meaningful side-effect guarantee. However, it does not disclose the return shape, failure behavior, or what 'safe' means, leaving important behavioral gaps.

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, front-loads the purpose, and contains no filler or repetition. It is efficient, although the brevity contributes to under-specification in other dimensions.

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 nine optional parameters, no annotations, no output schema, and no required fields, two sentences are insufficient. The agent is left to infer which parameter to supply, what the check covers, and what result to expect, and the unrelated schema parameters make the omission worse.

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?

All parameters have schema descriptions, so there is baseline information, but eight of the nine parameters describe inputs unrelated to file paths (URLs, city, JSON, zone, search query). The description only references 'path' and never explains which parameter(s) the tool accepts or how they relate, so the high schema coverage does not clarify invocation.

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 concrete action and resource ('check whether a path looks safe') and adds a useful constraint ('No disk access'), which loosely separates it from URL/domain siblings. However, 'safe' is undefined, and the schema exposes eight unrelated optional parameters (url, city, json, zone, query, etc.), making the tool's actual scope unclear.

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 given for when to use this tool instead of siblings like browser-url-ok, domain-shape, or normalize-url. There are no conditions, exclusions, or examples, so the agent must rely on the name and a terse description to make a routing decision.

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