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

No annotations are provided, so the description carries the full burden. It does add genuinely useful context: pricing ($0.22 per call, USDC on Base via x402) and that the score is sybil-rejection and token-decay adjusted. However it omits permission/read-only nature, rate limits, and latency, which matters for a paid call.

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 tight sentences; the core value proposition is front-loaded and the commercial detail trails it. No filler, though the sentence is dense enough that splitting cost from function would read better.

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?

No output schema and no annotations, so the description should say more about what the score looks like (scale, components, response shape). It gestures at the return ('eligibility score' + 'expected value') but leaves format and interpretation to inference.

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 schema already documents chain, address and expected_payout_usd. The description marginally enriches expected_payout_usd by framing it as the 'expected value of the opportunity', but adds nothing on chain or address semantics. Baseline 3 applies.

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?

Names a specific resource and output: 'Airdrop eligibility score for an address' plus 'calibrated expected value of the opportunity'. An agent can tell this scores airdrop farming opportunity, but the description never contrasts it with siblings like wallet-risk or wallet-status, which sounds adjacent.

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?

No guidance on when to use this versus wallet-risk/wallet-status or defi-risk-basic, and no prerequisites or exclusions stated. Usage is only inferable from the tool name and the word 'eligibility'.

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