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

With no annotations, the description carries the burden of explaining side effects, errors, and output shape; it only mentions dropping query and fragment. The schema descriptions of unrelated params being 'discarded' add confusion rather than transparency.

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 prose is concise and front-loaded, with no fluff; both sentences earn their place. However, the overall tool definition is bloated by nine optional parameters that are not reflected in the description.

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?

Given nine optional parameters, no required parameters, no output schema, and no annotations, the description is far too incomplete to understand how to invoke the tool correctly or what it returns. It does not explain the purpose of the unrelated parameters or the output structure.

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?

Although every parameter has a schema description, most are irrelevant to URL normalization (e.g., 'Git ref name', 'City name for a public weather hint', 'JSON text to validate') and provide misleading semantics. The only relevant parameter, 'url', is described vaguely as 'HTTPS URL to normalize or cite'.

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 clearly states the tool returns origin, host, and path for a URL and explicitly says query and fragment are dropped. It does not explicitly contrast with sibling URL-related tools, but the core purpose is specific 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?

There is no guidance about when to use this tool instead of alternatives such as web-fetch or URL-shape tools, nor any indication of what inputs are expected beyond the one URL.

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