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

With no annotations, the description carries the full burden and does well: it discloses pay-per-call pricing ($0.002 USDC on Base), the x402/MPP payment flow, and that unpaid calls return a 402 challenge. It also scopes results to the collected dataset, though it does not discuss rate limits, pagination, or read-only status explicitly.

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?

Three sentences, each carrying distinct information: purpose, use case, and payment behavior. The core capability is front-loaded with no filler.

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 one-parameter read tool with no output schema, the description explains the return shape (pairs, first/last seen, counts), the dataset limitation, and the payment protocol. It is largely complete, with only minor operational details missing.

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 single address parameter is already documented structurally. The description adds only that the address is a creator address, which is useful framing but not much 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?

The description names a specific verb and resource: given a creator address, return every pair it created, plus first/last seen timestamps and counts. It is clearly distinguishable from the sibling deployer_score, which scores a deployer rather than enumerating created pairs.

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?

It states a clear use case: spot serial launchers and repeat ruggers. However, it does not explicitly say when to prefer deployer_score, newpairs, or other siblings, so the routing guidance is good but not complete.

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