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

No annotations are present, so the description carries the behavioral burden. It adds the useful privacy context that page content is not stored, but it does not disclose other behaviors such as network access, response format, or the fact that several schema parameters are discarded during the check.

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 two-sentence description is front-loaded and free of filler; the core result and the privacy note each earn their place. It could be considered slightly undersized given the seven-parameter schema, but as pure conciseness it is strong.

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?

With no annotations, no output schema, and seven parameters, the description is incomplete. It does not explain the return format, the role or disposal of the non-URL parameters, or how this tool compares with sibling tools, leaving an agent to infer important invocation details.

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 input schema already describes all seven parameters with individual meanings, so high schema coverage sets the baseline at 3. The description adds no parameter-level detail beyond the notion that a URL is the relevant input.

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 output for a URL (host, scheme, HTTP status) and adds a distinguishing privacy note that content is not stored. It is clear about the core action, but it does not explicitly differentiate itself from siblings like normalize-url or fetch-status.

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 intended use is implied: call when host, scheme, or HTTP status for a URL is needed. There are no explicit when-not-to-use conditions or references to alternative sibling tools, so usage guidance is basic rather than explicit.

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