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

With no annotations and no output schema, the description carries the full burden of behavioral disclosure and delivers none of it. It does not say whether the URL is modified in place, what transformation 'cleaning' performs, whether network access or permissions are required, or how malformed URLs are handled.

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?

It is short and front-loaded, but this is under-specification rather than conciseness: a four-word sentence is all that exists for a tool whose core operation is completely unexplained. Nothing here earns its place because there is essentially nothing here.

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 no annotations, no output schema, and an undocumented parameter, the description is far too thin to let an agent invoke it correctly. It omits the definition of 'clean', the input format, the return behavior, and any failure modes.

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 coverage is 0% – the single 'url' parameter has an empty description – and the tool description only restates 'a single URL', adding no format, expected protocol, or validation meaning. The low-coverage case requires the description to compensate and it does not.

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 verb ('Clean') and resource ('URL') with a scope hint ('a single URL'), so the agent knows it operates on one URL. However, 'clean' is undefined terminology – it could mean stripping tracking parameters, normalizing encoding, or canonicalizing the host – and the description does nothing to distinguish it from sibling tools like url_reputation or redirect_trace. The purpose is only vaguely conveyed.

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 when-to-use guidance, no prerequisites, and no mention of alternatives among the many URL-related siblings (url_reputation, redirect_trace, security_scan). The agent is left to infer the context entirely.

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