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

The description discloses that query and fragment are dropped, which is a useful behavioral trait. However, with no annotations and a complex schema, it does not clarify whether the tool performs network access, validates the URL, or ignores unrelated input fields.

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 concise and front-loaded, with the main purpose stated first and a useful behavioral qualifier in the second sentence. It could have used one more clause to address the unusual parameter list, but it is efficiently written.

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?

Given the nine-parameter schema, no annotations, no output schema, and a family of URL-related sibling tools, the description is too minimal. It does not specify the return format, which parameter to populate, or how to handle the many apparently irrelevant input fields.

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, but the input schema contains many parameters that appear unrelated to URL normalization, such as city, feed, json, and zone. The description does not identify `url` as the primary/only meaningful parameter or explain that the other fields are discarded, leaving the agent without necessary disambiguation.

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 and resource: it returns origin, host, and path for a URL. It also adds a concrete behavioral detail, dropping query and fragment, which distinguishes it from URL-checking or fetching tools like browser-url-ok and web-fetch.

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 description implies the tool should be used when a URL's origin, host, or path is needed, but it does not explicitly state when not to use it or mention alternatives. There is no direct comparison to sibling tools such as fetch-status or citation.

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