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

With no annotations, the description must carry the behavioral load. It usefully discloses a trial quota tied to a signed wallet (a real operational constraint) and the output artifact type, but says nothing about payment/auth requirements, how invalid URLs are handled, or whether base is required at runtime.

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?

Front-loaded with the tool label and purpose, then the inputs in one clause. The trailing emoji promo is minor noise but the whole thing is two lines with no padding.

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?

For a simple 2-param generator with no output schema, the description covers what it makes and from what. It stops short of specifying URL list formatting, how base is combined with entries, and the resulting XML shape, which an agent needs to call it correctly the first time.

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 0%, so the description must compensate. It adds real meaning by calling 'urls' a list and 'base' optional, clarifying roles and requiredness. However, it never disambiguates the string encoding for the URL list (newline, comma, or JSON), which is the main ambiguity introduced by both params being plain strings.

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?

'Builds a sitemap XML document from a list of URLs and an optional base URL' gives a concrete verb plus resource and output artifact. It does not explicitly distinguish itself from the sibling x402-sitemap-parse, though the generate-vs-parse distinction is inferable from the name.

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 description never states when to pick this over x402-sitemap-parse or any URL/XML tooling sibling, nor any prerequisites. The only contextual note is a pricing quota ('5 free trial calls per signed wallet'), which is not usage guidance.

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