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

With no annotations, the description carries the full burden. It discloses the key side-effect-free behavior ('No disk access') but does not define what 'looks safe' means, what the return value is, or how invalid paths are handled. It provides some useful behavioral context but remains incomplete.

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 extremely concise, with no filler or redundancy. The safety qualifier is front-loaded. However, it is so brief that it leans toward under-specification rather than ideal conciseness.

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 has no annotations and no output schema, while the description fails to define safety criteria, return format, or parameter selection. With a crowded sibling set and a 9-parameter schema containing off-topic fields, an agent cannot reliably determine when and how to 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%, so the schema already documents each parameter. The description adds no parameter-level meaning beyond naming 'a path', and the schema includes many unrelated properties (url, city, feed, host, json, zone, query), creating ambiguity about which parameter is actually relevant.

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 specific verb ('Check') and resource ('a path'), with a safety qualifier ('looks safe'). It is clearly differentiated from sibling tools like browser-url-ok and wiki-title-ok by focusing on file paths rather than URLs or titles.

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 explicit when-to-use or alternative tool guidance is provided. 'No disk access' implies a lightweight validation context, but the description never states when to prefer this tool over siblings or what conditions make it inappropriate.

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