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

No annotations exist, so the description carries the full burden. It discloses the payment/auth context (a signed wallet with 5 free calls) which is genuinely useful, but says nothing about what the enrichment returns, latency, data sources, or what happens when multiple inputs are supplied at once.

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?

One sentence, front-loaded with the action and resource, with the pricing note trailing. The emoji is mild decoration but the text contains no wasted clauses.

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 four-parameter enrichment tool with no annotations, no output schema, and no parameter descriptions, the definition is thin. An agent cannot determine valid input combinations or what to expect back, which are the two things it most needs before invoking.

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 0% for all four parameters, so the description must compensate and does not. It names 'company/domain/person' but leaves the mapping ambiguous — it is unclear whether 'name' means a person or company name, and how 'entity' differs from 'company'. It also does not say that all four are optional or that at least one is required.

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?

States a specific verb and resource ('Enrich company/domain/person with web data + AI'), which is far more informative than the bare name. It does not distinguish itself from nearby siblings such as x402-company-check, x402-domain-intel, or x402-entity-lookup, so an agent cannot tell which to pick from this text alone.

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 statement of when to use this versus alternatives, no prerequisites for combining inputs, and no exclusions. The only usage-adjacent content is the pricing note about free trial calls, which is not selection guidance.

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