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

With no annotations supplied, the description carries the behavioral burden. It does disclose a real behavior: query and fragment are dropped, and origin, host, and path are returned. However, it does not mention failure behavior, read-only guarantees, or that apparently unrelated parameters such as ref, city, feed, json, host, and path are discarded, which the schema only hints at.

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?

Two short sentences, front-loaded with the operation and followed by the key behavioral caveat. There is no filler, redundancy, or wasted wording.

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 seven parameters but the description only explains one of them and does not clarify the role of the others. An agent will not know whether it can ignore those parameters, what the 'path' output looks like, or how the tool behaves when the URL is invalid. The absence of an output schema makes this gap more significant.

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 individual descriptions in the schema, so schema coverage is high, and the baseline is 3. The description adds meaning only to the main URL behavior and does not clarify why the other parameters exist or how they relate to the stated task.

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, with query and fragment removed. This distinguishes it from sibling URL-validation tools like browser-url-ok and playwright-url-ok, which only check status rather than returning normalized components, though it doesn't explicitly name the alternative it is not.

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?

There is no when-to-use or when-not-to-use guidance, and no alternative tool is mentioned. The only implicit signal is that this tool is for extracting normalized URL components, but exclusions or conditions that would route an agent to a sibling tool are absent.

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