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

With no annotations, the description carries full burden, and it does disclose the cost ($0.005) and the x402 payment mechanism, which is valuable behavioral context. However it omits whether this is a read-only operation, rate/pagination limits, and what the crawl actually returns, leaving meaningful gaps for a mutation-adjacent paid tool.

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?

A single tight sentence with the pricing and payment mechanism front-loaded ahead of the capability. Efficient, though the cost prefix slightly dilutes the core purpose statement.

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?

No output schema and no annotations, so the description should do more work. It explains the crawl scope but says nothing about result shape or pagination limits beyond the schema's 1-5 constraint, leaving the agent with an incomplete picture of the return.

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 100%, so the schema already documents all four parameters (url, limit, keyword, x_payment), making the baseline 3. The description maps loosely onto keyword ('scan for target keywords or signals') but adds no format or syntax detail beyond the schema.

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?

Names a specific verb (crawl) and resource (internal links of a domain) plus two concrete goals: discover site structure and scan for target keywords/signals. An agent can distinguish this from single-page siblings like web_scrape, though no sibling is named explicitly.

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 'internal links of a domain' implies a multi-page crawl use case, but the description never states when to pick this over web_scrape, markdown_web_scraper, or web_search, nor any prerequisites or exclusions. The agent must infer the routing decision.

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