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

The description mentions that query and fragment are dropped, which is a behavioral detail, but it does not disclose any side effects, permissions, or read-only status. There are no annotations to fill this gap. The tool may silently ignore most input parameters, but this is not transparent. The behavioral transparency is insufficient.

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 concise: two sentences that clearly state the primary function. It is well-structured and easy to read. However, given the large schema, the description is too brief to cover the necessary details, but conciseness itself is not a flaw. It earns a high score for being succinct.

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 description is far from complete given the tool's context. It provides no output schema, no information about the return format, and no explanation for the majority of input parameters. The tool's behavior with the extra parameters is completely undocumented. This is a major gap, making the tool unsuitable for an agent without additional context.

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?

The description only implicitly references the 'url' parameter, leaving the other 8 parameters completely unexplained. The schema provides generic descriptions for these parameters (e.g., 'Git ref name' for ref, 'City name' for city) that are clearly copied from other tools and do not relate to URL normalization. The description does not clarify which parameters are actually used, making the parameter semantics nearly useless.

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 core purpose is stated clearly: return origin, host, and path for a URL while dropping query and fragment. However, the schema lists 9 parameters, most of which (ref, city, feed, etc.) are unrelated to URL normalization, creating ambiguity about what the tool actually does. The description does not reconcile this mismatch, so the overall purpose is only partially clear.

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?

No guidance is given on when to use this tool versus sibling tools like browser-url-ok or fetch-status. The description does not explain whether the extra parameters are ignored or relevant, nor does it mention that only the 'url' parameter is required for the stated operation. This leaves the agent without enough instruction on how to call the tool correctly.

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