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

With no annotations, the description carries the full burden of behavioral disclosure. It adds one useful note about page content not being stored, but omits network side effects, redirect handling, failure modes, and the purpose of the json and zone parameters.

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?

Two short sentences, front-loaded with the primary function and no filler. The main action is immediately clear and the additional privacy note is compact.

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 inadequate for a 4-parameter tool: it only addresses the url behavior, leaves json and zone unexplained, and provides no usage guidance, side-effect disclosure, or output detail. This is a significant completeness gap for an agent trying to decide how to call it.

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 description coverage is 100%, so the baseline is 3. The description itself does not add meaning beyond the schema and completely ignores the json and zone parameters, making the parameter list feel inconsistent with the stated URL-only purpose.

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 has a clear verb and resource: it returns host, scheme, and HTTP status for a URL. It is specific enough to understand the core action, though it does not explicitly distinguish itself from sibling tools like normalize-url or status-catalog.

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 versus alternatives such as normalize-url or validate-json. The only extra note ('Page content is not stored') is a privacy statement, not a usage condition.

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