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

The description discloses one behavioral aspect (no disk access) but does not explain return format, side effects, or failure modes. With no annotations, the description carries the burden but covers only minimal detail.

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, clear sentence with no unnecessary words. It is well-structured and to the point.

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 is incomplete for the tool's actual scope due to the mismatched parameter set and absence of an output schema. An agent would not understand how to use the unrelated parameters or what result to expect.

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 all 9 parameters have descriptions, most are irrelevant to the tool's stated purpose (e.g., city, timezone, RSS feed). Only 'path' aligns with 'file-path-ok', creating confusion and poor semantic match.

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 checks whether a path looks safe and explicitly notes no disk access. This distinguishes it from sibling URL-checking tools like browser-url-ok and playwright-url-ok.

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?

The description provides no information on when to use this tool versus alternatives, nor any conditions or prerequisites. No guidance is given beyond the basic function.

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