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

The description discloses a key transformation: query and fragment are dropped. However, no annotations are provided, and the description does not mention error behavior, whether the tool is purely local, or what happens if the URL is invalid. It provides some transparency but not full coverage.

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 filler. The main purpose is front-loaded, and the second sentence adds a meaningful behavioral detail without redundancy.

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?

With nine optional parameters and no output schema, the description does not clarify that only the 'url' parameter is the real input for normalization, nor does it explain what happens if other parameters are supplied. The gap between the simple description and the large optional schema creates real invocation ambiguity.

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 already documents all nine parameters. The description adds no parameter-level meaning beyond clarifying that the URL's query and fragment are removed, which is a minor semantic contribution.

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 action ('Return') and the exact output ('origin, host, and path') for a URL, so an agent can understand the tool's core function. It does not explicitly distinguish itself from URL-related siblings like browser-url-ok or fetch-status, so it stops short of a 5.

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 alternatives such as browser-url-ok, fetch-status, or citation. The intended usage is only implied by the tool's name and output description, not stated with conditions or exclusions.

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