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

There are no annotations, so the description carries the behavioral burden. It does disclose an important transformation: query and fragment are dropped, and only origin, host, and path are returned. However, it does not clarify that the many extra schema parameters appear to be decoys/ignored, nor does it state failure behavior or whether any network access occurs.

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 two short sentences with no wasted words. It front-loads the core output behavior and immediately states the exclusion behavior, making it easy for an agent to parse quickly.

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 parameters and no output schema, yet the description is very thin. It does not identify the 'url' parameter as the one that matters, does not define the exact shape of the returned origin/host/path, and does not explain why so many unrelated fields exist. The schema partially compensates, but the overall definition is not complete enough for confident 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 coverage is 100%, so the baseline is 3. The description itself adds little parameter-level meaning, only mentioning URL and the dropped query/fragment. It does not clarify the confusing relationship between the 'host' and 'path' input fields and the 'host' and 'path' values returned by the tool.

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 the verb ('Return'), the resource ('origin, host, and path for a URL'), and a key behavioral rule ('Query and fragment are dropped'). This distinguishes it from siblings like browser-url-ok or web-fetch, which check or fetch rather than normalize and extract components.

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. With sibling tools such as browser-url-ok, web-fetch, and fetch-status present, the description offers no explicit condition or exclusion to help an agent choose it. The use case is only implied by the name and first sentence.

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