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

With no annotations present, the description discloses the key transformation behavior—query and fragment are dropped—and states what is returned. However, it does not clarify whether network access or auth is involved, nor does it explain how the many other schema parameters relate to the normalization behavior, leaving transparency partial.

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 function is front-loaded, followed by a useful caveat about query and fragment handling. Every sentence earns its place.

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 core behavior is clear enough for basic invocation, and the schema's inline descriptions mitigate confusion from the seven parameters by explaining that many are discarded. Still, the lack of required markers, any output schema, or an explicit statement that only `url` is used makes the description only minimally complete for correct 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?

All seven parameters already have descriptive text in the input schema, so schema coverage is high; the description adds only the URL-specific normalization behavior and does not need to repeat parameter meanings. It does not, however, help the agent identify which parameter is required or whether the extra parameters should be ignored.

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 verb and resource: it returns origin, host, and path for a URL, and clearly notes that query and fragment are dropped. This distinguishes it from sibling fetch/check tools in substance, though it does not explicitly name a sibling alternative.

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 provided about when to use this tool instead of related URL tools such as browser-url-ok, domain-shape, or web-fetch, and no conditions or exclusions are stated. The intended context is only implied by the mention of URL component extraction.

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