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

With no annotations, the description must carry the full behavioral burden. It discloses 'No disk access,' which is a useful safety note, but it omits any mention of side effects, return format, or behavior for the many non-path parameters. The statement is too sparse to inform the agent about potential state changes or error conditions.

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?

It is a single concise sentence, which is structurally clean. However, given the tool has 9 parameters and a potentially multi-purpose role, the brevity is under-specification rather than effective conciseness. The sentence is front-loaded with the core action, but it lacks any follow-on structure to cover the breadth of inputs.

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 description is highly incomplete for a tool with 9 parameters, no output schema, and no sibling differentiation. It does not explain how the path check relates to the other apparent input types (URLs, JSON, timezone, etc.), leaving the agent unable to determine correct usage. The description provides almost no context for making an informed invocation decision.

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 coverage is 100%, so each parameter has a description, but the tool description adds no additional meaning beyond the schema. It only references 'path' and repeats the 'no disk access' note, offering no insight into how the other 8 parameters are used or why they coexist in a path-checking tool. The description fails to contextualize the parameters or explain their role in the check.

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 verb ('check') and a resource ('path') with a safety qualifier, but 'safe' is vague and the tool is not differentiated from siblings like 'browser-url-ok' or 'domain-shape'. The inclusion of 9 unrelated parameters (ref, url, city, feed, etc.) in the schema further muddies the actual purpose, leaving the agent unsure what the tool truly validates.

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 provided on when to use this tool versus alternatives. It does not mention what type of path check it performs, whether it is suitable for URLs, hostnames, or other inputs, or when to prefer a sibling tool. The description gives zero usage context beyond a one-line action.

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