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

The description adds a meaningful behavioral trait: 'No disk access.' This clarifies that the tool is a non-destructive, in-memory shape check. However, it does not disclose whether it returns a boolean, throws errors on invalid input, or silently discards the non-path parameters, and no annotations are provided to fill that gap.

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 extremely concise and front-loaded, with no redundant words. 'No disk access' earns its place by immediately setting expectations about side effects. It could arguably be more informative, but it does not waste any space.

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 has seven parameters, no output schema, and no annotations, but the description only addresses 'path.' An agent cannot tell which parameter to supply for which goal or what the return value looks like. The multimodality implied by the schema is unresolved, making the description incomplete for correct invocation.

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?

All seven parameters have descriptions in the schema, so schema_description_coverage is high. The description itself adds no parameter-level meaning, but with the schema already documenting each field, the baseline of 3 applies.

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') with a clear resource (path) and quickly distinguishes it from disk access. However, the input schema lists six unrelated parameters (ref, url, city, feed, host, json), which makes the tool's exact scope less crisp than it could be.

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 guidance is given about when to use this tool versus alternatives like wiki-title-ok, browser-url-ok, or domain-shape. The only contextual hint is 'No disk access,' which implies a pure format check but does not name any sibling or exclusion condition.

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