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

With no annotations, the description carries the behavioral-disclosure burden. It does disclose that query and fragment are dropped, which is key behavior beyond the schema. However, it does not clarify whether the many unrelated parameters in the schema are ignored or discarded, leaving ambiguity about side effects and parameter handling.

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: the first states the main output, and the second states the dropped components. It is front-loaded and every word earns its place.

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?

Despite having nine parameters, no output schema, and no annotations, the description provides only two sentences. It lacks guidance on which parameter to pass, how the returned origin/host/path are formatted, and what happens with apparently irrelevant schema fields, making the definition incomplete for reliable 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 each parameter already has a description. The tool description adds little about parameter meaning beyond implying the url parameter is the primary input. It does not help an agent choose among the nine largely unrelated-looking parameters, so the baseline of 3 is appropriate.

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 action (return origin, host, and path) and a clear resource (a URL), which is immediately understandable. It does not explicitly differentiate from sibling URL tools, but the output list and normalization focus make the tool's role clear enough.

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 cases where only the normalized origin/host/path are needed and query/fragment should be dropped, but it gives no explicit when-to-use or when-not-to-use guidance. There are no named alternatives or exclusions beyond the URL component behavior.

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