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

With no annotations visible, the description must carry behavioral disclosure; it does disclose the important trait 'No disk access.' However, it does not state the return shape, whether any input is rejected, or whether other side effects occur, so transparency is only partial.

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 short sentences with no filler; the core purpose and key constraint are front-loaded. Every word earns its place.

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 schema exposes seven disparate input properties, but the description only mentions paths. An agent has no way to know which property to use for a given task or how the tool behaves for url, json, feed, etc. There is also no output schema or return information, so the description is incomplete for a tool with this much surface area.

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 input parameters are described in the schema itself, so schema coverage is high and the baseline is 3. The description adds no parameter-level nuance and, in fact, its singular focus on 'a path' conflicts with the schema's many unrelated properties.

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 clearly states a specific verb ('Check') and resource ('a path'), and adds a useful boundary with 'No disk access'. However, 'safe' is vague and the description does not differentiate itself from sibling shape-checking tools beyond the word 'path'.

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 phrase 'No disk access' implies this is a static, off-line path check, so an agent can infer a common use case. But there is no explicit guidance about when to prefer this over sibling tools like browser-url-ok or wiki-title-ok, and no mention of exclusions.

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