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

No annotations are provided, so the description carries the disclosure burden. It does state the returned components and the fact that query and fragment are dropped, but it does not mention behavior for invalid URLs, output formatting, or what happens to the many other parameters listed in the schema.

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 a single, front-loaded sentence with no filler. Each clause earns its place: the output is stated first, and the dropping behavior is a relevant constraint. This is appropriately concise for a simple utility.

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 operation is simple and the schema documents each parameter's discarding behavior, but the description does not specify the output structure, and there is no output schema to fill that gap. It also does not position the tool against the many URL-related siblings, leaving some contextual 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 high; every parameter already has an explanatory description, so the baseline is 3. The tool description adds the 'query and fragment are dropped' rule for the url parameter, but it does not clarify how url relates to the other parameters or whether they are simply 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 uses a specific verb ('Return') and a clear resource ('origin, host, and path for a URL'), and it adds the behavioral detail that query and fragment are dropped. It is clear, but it does not explicitly distinguish normalize-url from URL-related siblings such as domain-shape or browser-url-ok.

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 described behavior implies when to use the tool: when a URL needs to be reduced to origin, host, and path. However, there is no explicit guidance about when not to use it, no mention of alternatives, and no indication that non-URL parameters are ignored, so guidance remains mostly implicit.

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