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 a key behavioral trait: 'No disk access.' It also hints that this is a syntactic/heuristic check ('looks safe') rather than a filesystem guarantee. However, it does not state return behavior, failure behavior, or whether values other than 'path' are ignored.

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 short sentences, front-loaded with the core purpose and followed by the key safety guarantee. There is no filler, repetition, or buried detail. The description earns its length despite being incomplete 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?

Given 9 optional parameters, no annotations, and no output schema, the description is too thin. It does not say what the tool returns, how a caller should interpret 'safe,' or whether only the 'path' parameter is meaningful. An agent cannot confidently know how to invoke this tool correctly among its many parameters and sibling tools.

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 descriptions for all 9 parameters, so the schema already handles parameter-level meaning. The description adds no parameter information beyond the schema. This is a baseline 3 case, though the presence of many apparently unrelated parameters (url, city, feed, host, json, zone, query) makes the schema confusing and the description does nothing to clarify which parameter actually drives the tool.

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 uses a specific verb and resource: 'Check whether a path looks safe.' Combined with the schema's 'File path to check' parameter, it is clear this validates file-path shape and not, say, a URL or hostname. It does not explicitly distinguish itself from sibling shape-checking tools, but the name and wording are specific enough.

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 gives no when-to-use guidance, no exclusions, and no alternatives. With siblings like browser-url-ok, normalize-url, and wiki-title-ok, an agent gets no help choosing this tool over a related shape-checking tool. The only implied context is that the tool is for checking path safety, which is minimal.

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