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

With no annotations, the description carries the full behavioral disclosure burden. It does disclose that query and fragment are dropped, but it says nothing about whether this is a local-only operation, whether it performs network/disk access, whether it has side effects, or how invalid URLs 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, front-loaded, and contains no filler. The first sentence gives the core action and output, and the second adds a relevant transformational detail. For what it covers, it is appropriately compact.

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 9 optional parameters, no annotations, and no output schema. The description does not say which parameter to pass, whether all other parameters are ignored, what the returned value looks like, or how errors are reported, making it incomplete for reliable selection/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?

Schema description coverage is 100%, so the schema carries the parameter meaning. The description adds the URL-level behavior of dropping query and fragment, but it does not clarify that the 9 optional parameters are mostly discarded or that only the 'url' field is the actual target of the operation.

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 concrete verb and resource: return origin, host, and path for a URL. It also adds the query-and-fragment dropping behavior, which helps distinguish it from URL fetch/status siblings. It does not explicitly contrast those siblings, so it is clear but not maximally differentiated.

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 browser-url-ok, web-fetch, citation, or other URL-related siblings. The description does not state prerequisites, exclusions, or when NOT to use it, so an agent must guess from the name and friend tool list.

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