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

With no annotations provided, the description carries the full burden. It discloses that query and fragment are dropped—a meaningful behavioral trait. However, it does not explicitly state that this is a read-only operation, nor does it explain error handling, non-HTTP inputs, or what happens if the URL is malformed. It is minimal but not misleading.

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 that states the core output and key drop behavior. Every word earns its place; there is no filler or 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?

For a simple URL normalization tool, the description covers the main functional behavior (returning origin, host, path; dropping query/fragment). It does not address the 9-parameter schema's oddity (most params are irrelevant to the stated purpose), but the schema itself explains those params are discarded. An agent would likely call this tool with just a URL and get the expected result.

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 baseline is 3. The description itself adds no parameter-level detail; it only mentions the conceptual operation on a URL. The schema already documents each parameter, including that many are discarded after checks, so the description neither helps nor hinders parameter understanding.

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: 'Return origin, host, and path for a URL' and clarifies what is dropped ('Query and fragment are dropped'). This clearly distinguishes it from sibling tools like fetch-status or browser-url-ok, which check connectivity rather than normalize.

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 gives no guidance on when to use this tool over alternatives. It does not mention common use cases, comparisons to siblings, or conditions under which a different normalization tool (e.g., domain-shape) might be preferred. The agent must infer usage from the name and sibling context.

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