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

With no annotations provided, the description carries the burden of behavioral disclosure. It does disclose the key trait 'No disk access,' which is valuable for a path checker, but it does not mention return behavior, error handling, or whether network access is also avoided. This is partial transparency, not full.

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 with no filler: the first states the action, the second gives a crucial behavioral constraint. Both sentences earn their place, and the structure is appropriately front-loaded.

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 output schema, and no annotations, two sentences are insufficient. The description does not explain what 'safe' means, what the tool returns, or how the agent should supply the path among the many optional properties. It covers the core idea but leaves major operational 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?

The schema has 100% parameter description coverage, so the baseline is 3; the description does not need to restate individual parameters. However, the description adds no clarity about how the eight unrelated-looking schema properties relate to checking a path, and it does not indicate which property is the actual path input.

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 clear action and resource: 'Check whether a path looks safe' and adds the useful scope 'No disk access,' so an agent can see this is a static path validation rather than a filesystem operation. It does not differentiate from sibling shape-checking tools, and 'safe' remains somewhat vague (syntactic validity vs. traversal safety).

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 guidance on when to use this tool versus alternatives such as normalize-url or wiki-title-ok, and it does not state any prerequisites or exclusions. 'No disk access' hints at a lightweight check but does not provide explicit usage context.

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