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

With no annotations, the description carries the behavioral burden. It does disclose a meaningful behavior—query and fragment are dropped—and implies a read-only transformation. However, it does not state the output shape, behavior for invalid URLs, whether other accepted parameters are ignored, or whether the operation is local versus network-based.

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, and the core behavior is front-loaded. Every word contributes to the stated transformation.

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 tool has nine optional parameters, no annotations, no output schema, and many sibling tools, yet the description provides only the core behavior. It does not identify which parameter is required, how the result is structured, or how to distinguish this tool from related siblings, leaving significant gaps 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?

Schema description coverage is 100%, so the baseline is 3 and the description does not need to restate parameter meanings. The description adds a useful detail about URL query/fragment dropping, but it also creates confusion because the description's `path` and `query` refer to URL components, not the schema's `path` (file path) and `query` (search text) parameters.

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 operation—return origin, host, and path for a URL, dropping query and fragment—so it is not tautological. However, the input schema exposes nine unrelated optional parameters and includes `path` and `query` as inputs, which collide with the description's output terms. With zero required parameters, an agent cannot confidently determine which parameter actually supplies the URL.

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 is for extracting origin/host/path from a URL, but it gives no explicit when-to-use or when-not-to-use guidance. It names no alternatives, even though many sibling tools such as `domain-shape`, `browser-url-ok`, and `web-fetch` overlap with URL-related tasks.

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