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

With no annotations, the description carries the full burden of behavioral disclosure; it does disclose the most important trait, that no disk access occurs. But it does not mention that the other accepted inputs are validated and discarded, what the return value is, or what 'safe' means (syntax only vs. existence), so the behavioral picture is 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 two short sentences, front-loads the action and resource, and contains zero filler words. The brevity is a strength, though it leaves out contextual information that would need to be added elsewhere.

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 a large sibling set, the description is far too thin. It addresses only the path parameter, never explains the other eight inputs, the return format, or the selection rules, so an agent cannot reliably invoke this tool correctly based on the description alone.

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 each parameter already has an explanatory description, which is the baseline case. The tool description adds no additional parameter semantics beyond repeating the no-disk-access point for path, and it does not explain how the nine optional parameters relate or whether one or many should be supplied.

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 action ('Check whether a path looks safe') and a key non-behavior ('No disk access'), which makes the core purpose clear and separates it from disk-accessing tools. However, it never acknowledges the other eight parameters in the schema (url, json, zone, etc.), so the stated purpose is narrower than the actual tool surface.

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 only usage hint is 'No disk access,' which implies a safe syntactic check rather than a filesystem probe, but the description gives no explicit when-to-use guidance and names no alternatives. With 27 sibling tools, an agent gets no help choosing file-path-ok over wiki-title-ok, domain-shape, or other shape-checking siblings.

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