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

With no annotations, the description carries the full disclosure burden. It does disclose the most safety-relevant behavior — no disk access — but it does not state the return shape, error behavior, or what counts as 'safe'. The one real behavioral fact it adds beyond the schema is useful but 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?

It is a two-sentence description with zero waste. The core claim is front-loaded, and the important non-obvious behavior ('No disk access') is included right after. Nothing padding could be removed without loss.

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 simple and the schema covers all nine parameters, so it does not need a long description. However, there is no output schema and no explicit return contract; the agent must infer a boolean/verdict from 'whether,' and the description never bounds what 'looks safe' means. That leaves mild but real gaps.

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 baseline is 3; each parameter already has a meaningful description including 'discarded' flags. The description adds no extra parameter semantics, and it doesn't explicitly say that all parameters other than 'path' are irrelevant, though the schema largely conveys this.

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 + resource ('check whether a path looks safe') and adds a useful scope qualifier ('No disk access'), clearly separating this from filesystem-access paths and sister shape checks like browser-url-ok or wiki-title-ok. An agent knows what the tool is for without opening the schema.

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?

There is no explicit mention of when to use the tool vs alternatives, or when not to use it. The 'No disk access' note is a behavioral constraint, not real usage guidance, so an agent is left to infer that this is only for syntactic/safety checks.

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