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

With no annotations, the description carries the full behavioral burden and discloses meaningful traits: scanning homepage plus contact/about pages, success-based charging, and payment via x402 at $0.005 USDC on Base. It still omits failure behavior, rate limits, and payment workflow details, so it is strong but not complete.

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 front-loaded and dense, with each clause contributing useful scope, output, or payment information. The parenthetical about Cloudflare-obfuscated emails is relevant and not wasteful.

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?

Because there is no output schema and no annotations, the description appropriately lists extracted fields and discloses billing behavior. It is nearly complete for a simple two-parameter tool, but it could say more about error handling or the payment flow.

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 schema already documents both url and maxPages. The description adds scanning context but does not clarify parameter behavior, and its 'homepage plus up to 5 contact/about pages' wording is not clearly mapped to the maxPages parameter.

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 names the resource as website contacts / lead enrichment and enumerates the extracted data: emails, phones, social profiles, postal address, and organization name. This is clear enough for an agent to identify a contact-extraction tool, though it does not explicitly contrast itself with the sibling tools.

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 phrase 'lead enrichment' implies a usage context, and the scan scope indicates it operates on a company website. However, the description gives no explicit when-to-use or when-not-to-use guidance and does not name alternatives among the sibling tools.

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