get_paywall_payments

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

With no annotations, the description carries the full behavioral burden, and it does disclose that only 'verified payments' are returned and what fields come back. However, it omits pagination behavior, auth/permission requirements, and any rate-limit or ordering context, so the disclosure is partial rather than rich.

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?

Two short sentences with the purpose front-loaded and return contents second; there is essentially no filler. Slightly cursory but well-structured.

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 read-only lookup with a fully documented 3-parameter schema and no output schema, the description covers purpose and enumerates the returned fields, which is what the missing output schema would otherwise need. It stops short of describing pagination semantics and failure modes.

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 paywall_id, page, and per_page are already documented in the schema. The description adds only the notion that paywall_id scopes results to one paywall; no format, default, or limit details beyond what the schema provides.

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 — 'Get payment history for a specific x402 paywall' — with a clear scope (single paywall). It does not, however, explicitly distinguish itself from siblings like list_payments or get_x402_revenue, leaving the agent to infer the boundary.

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 says when to use this tool versus alternatives such as list_payments or get_x402_revenue, nor does it state prerequisites. It only describes what the call returns, leaving selection entirely to inference.

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