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

With no annotations, the description carries the full burden. It discloses only 'No disk access' and does not mention that the other accepted parameters are effectively discarded, what 'safe' means, whether it returns a boolean, or how invalid paths are handled.

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 short and front-loaded, with no filler: the core action and the no-disk-access caveat come first. However, it is too terse for a schema containing nine unrelated optional parameters; a little more structure would improve usability.

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?

There is no output schema and no annotations, so the description must explain what the agent will receive; it does not. It also fails to clarify the return format, acceptable path syntax, or why the schema exposes so many unrelated parameters. This is incomplete for the tool's actual complexity.

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?

Although the schema has 100% description coverage, most parameters are irrelevant to a file-path check (url, city, feed, host, zone, query) and read like descriptions from other tools. The description does not identify 'path' as the operative parameter or explain that all others are ignored, making misuse likely.

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 and resource: 'check whether a path looks safe' and adds a meaningful boundary, 'No disk access.' This distinguishes it from URL-oriented siblings at a high level, though 'safe' is left undefined and no alternative tool is named.

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 siblings such as domain-shape, wiki-title-ok, or normalize-url. The only usable signal, 'No disk access,' implies a lightweight syntactic check, but no explicit when-to-use or when-not-to-use instruction is provided.

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