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

Annotations already declare read-only, idempotent, open-world, non-destructive, but the description adds behavior they cannot express: cost ($0.01 per call, 10 free/day, x402 payment-required result), error semantics (isError for invalid input or upstream failure, not charged), and the replay scope (15 most recent launches). That is meaningful disclosure beyond the structured fields.

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?

It is dense but front-loaded: the returned metrics come first, then usage, then cost, then error behavior. Every sentence carries information, though the run-on enumeration of metrics and the pricing/error clause make it longer than strictly necessary for a single-parameter tool.

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?

Given an output schema exists, the description correctly focuses on routing, cost, and failure modes rather than return shape, and the annotations already carry the safety profile. Nothing an agent needs to invoke it or handle payment/error outcomes is 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% with a single well-documented 'creator' property (Base58 pattern, 32-44 chars), so the baseline is 3. The description goes slightly beyond the schema by stressing that this must be the dev wallet rather than the mint address, which disambiguates a common misuse.

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 resource (a creator wallet's launch history) and enumerates exactly what it computes: launches, graduation rate, launch cadence, dev sell speed, and a verdict. It also explicitly distinguishes itself from the closest sibling by stating 'pass the dev wallet, not the mint (pump_token reports the dev of a mint)', so an agent can route correctly without opening either schema.

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 gives an explicit 'When to use' clause scoped to the creator of a token, plus a negative instruction ('not the mint') and names the alternative tool that reports the dev of a mint (pump_token). This is precise when/when-not/alternative routing.

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