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

No annotations are provided, so the description carries the behavioral burden. It discloses that query and fragment are dropped, which is useful, but it does not state whether any network access occurs, how invalid or non-HTTPS URLs are handled, or whether the many other optional parameters are ignored. This is adequate but incomplete.

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 terse sentences with no filler. The primary output is front-loaded, and the transformation rule follows immediately.

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?

With nine optional parameters, zero required parameters, no output schema, and no annotations, the description leaves too much unspecified. It never tells the agent which parameter to pass, what happens if none or several are supplied, or how failures are reported. The shorter description works only if the agent already knows the tool's convention.

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 adds little beyond the schema: it does not explicitly identify `url` as the active parameter or clarify that all other fields are irrelevant, and the word 'Query' could be momentarily confused with the optional `query` schema property.

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?

States a specific verb and resource: 'Return origin, host, and path for a URL.' It also names a concrete transformation rule, 'Query and fragment are dropped,' which distinguishes it from URL-fetching or reachability-checking sibling tools.

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?

Usage is implied by the description: use this when you need origin, host, and path from a URL without query/fragment. However, no alternatives are named and there is no explicit when-to-use vs siblings such as browser-url-ok, web-fetch, or domain-shape.

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