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

With no annotations, the description must carry the behavioral burden. It discloses one useful trait—no disk access—but does not state what the tool returns, what 'looks safe' means, whether it is pure, or how the many unrelated schema parameters factor in.

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?

Two sentences, no filler, and the key constraint 'No disk access' is front-loaded. It scores well for brevity, though it is perhaps too terse for a schema with nine properties and no output schema.

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 definition is not complete for an agent. It has no output schema, no annotations, a nine-parameter input schema, and many sibling tools with similar-looking checks, yet the description explains only one parameter and never states the return contract or how the other parameters should be handled.

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, including 'File path to check' and the 'discarded after' notes. The description adds no parameter-level meaning beyond that, which meets the baseline but does not resolve the confusion created by the nine-parameter schema.

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 names a concrete operation ('Check whether a path looks safe') and adds a useful constraint ('No disk access'). However, the input schema lists nine unrelated parameters such as url, city, feed, host, json, zone, and query, so the statement covers only one of several apparent inputs and leaves the tool's actual scope ambiguous.

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 when/when-not guidance is provided. The description implies a safe pre-flight check, but it never says when to choose this tool over siblings like browser-url-ok, normalize-url, or wiki-title-ok, nor when it should be avoided.

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