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

With no annotations, the description must carry behavioral disclosure, and it does say 'No disk access,' which is a meaningful safety-related boundary. However, it does not explain what 'safe' means, what the tool returns, or whether there are any other side effects.

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 only two short sentences with no filler. The core action is front-loaded, and the 'No disk access' clarification earns its place by setting an important expectation.

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 no annotations, no output schema, and nine input parameters, the description is too sparse. It does not state the return value, the notion of path safety, or how the additional schema parameters relate to the purpose, leaving the agent to infer too much.

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 already provides descriptions for all parameters, so the baseline is 3. The description adds no extra parameter-level meaning, and it does not clarify why unrelated-looking parameters such as url, city, feed, and json are present in a path-checking 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 states a clear action and target: 'Check whether a path looks safe' identifies this as a file-path validation tool. It is distinct enough from the title and gives a concrete purpose, but it does not explicitly differentiate itself from related sibling tools such as browser-url-ok or wiki-title-ok.

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 guidance about when to use this tool versus alternatives like browser-url-ok, playwright-url-ok, or normalize-url. 'No disk access' is a useful hint, but it is not framed as a selection criterion or exclusion rule.

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