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

The description discloses that query and fragment are dropped, which is a useful behavioral trait. However, it does not explain the fate of the other 8 parameters, nor does it mention any side effects, permissions, or error behavior. With no annotations, the description carries the burden but falls short.

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, with the primary purpose front-loaded. It is easy to read and gets to the point quickly. However, it is so terse that it omits essential context about parameter usage, but the conciseness itself is appropriate.

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?

For a tool with 9 parameters and no output schema, the description is severely incomplete. It does not explain the output format (just 'origin, host, and path' without structure), how to supply the URL, what happens with other parameters, or any prerequisites. The mismatch between the description and the schema leaves an agent guessing.

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 schema provides descriptions for all 9 parameters, so the baseline is 3. The tool description adds no parameter-specific meaning beyond the schema; it does not clarify that 'url' is the only relevant input or how others should be used. It neither helps nor confuses beyond what the schema already offers.

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 purpose: return origin, host, and path for a URL, and drop query and fragment. However, the input schema lists 9 unrelated parameters (e.g., city, feed, json) with no explanation of how they relate, creating ambiguity about which parameter is the URL and what the tool actually does with the others.

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 on when to use this tool versus the many sibling tools (e.g., browser-url-ok, fetch-status, web-fetch). It does not specify that it is for normalizing a URL or that only the 'url' parameter matters. No exclusions or alternatives are mentioned.

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