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

With no annotations provided, the description carries the full burden of behavioral disclosure. It discloses that page content is not stored, which is useful, but it omits other important behaviors such as making an HTTP request, possible network failures, external side effects, or whether content is only read transiently.

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 two short sentences, front-loaded with the core purpose and immediately followed by a meaningful boundary. Every word earns its place.

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 only addresses URL citation behavior, while the schema exposes four parameters spanning multiple concerns (url, host, json, zone). Without an output schema and with no annotations, this mismatch leaves the full range of tool behavior unexplained.

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 covers all parameter meanings with 100% description coverage, so a baseline of 3 is appropriate. The description adds no extra parameter context and does not mention the json or zone parameters, but the schema already documents these adequately.

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 clearly states a specific action ('Return') and a concrete resource ('host, scheme, and HTTP status for a URL'). The added note 'Page content is not stored' clarifies that this is not a content-capture tool, though it does not explicitly differentiate it from sibling tools that might also inspect URLs.

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 provided about when to use this tool versus alternatives. The 'Page content is not stored' note hints at a privacy angle but does not state conditions, exclusions, or sibling tool comparisons, leaving an agent to infer usage context.

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