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

With no annotations, the description carries the full burden and does so: it discloses the paid x402 flow and exact cost ($0.01 USDC on Base), the data provenance (deepest WETH or USDC pool on Uniswap v3 or Aerodrome), and that output is factual rather than advisory. These are exactly the operational facts an agent needs before committing to 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?

Front-loaded with the core capability and output inventory, then closes with the decisive cost line. The middle clause is long and comma-dense but each item listed is return-relevant information, not 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?

No output schema and no annotations, yet the description enumerates the returned fields, states the price/liquidity source, and surfaces the payment cost and rail — everything needed to decide to call and to interpret the result. Only secondary gaps remain, such as behavior on a non-token address.

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% and the single parameter already documents the 0x-prefixed 40-hex contract address format. The description adds only the ERC-20-on-Base framing, which is implicit in the tool name and schema, so it neither fills a gap nor adds syntax guidance.

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: a rug-check/due-diligence snapshot of an ERC-20 token on Base, and enumerates exactly what it returns (risk score, supply, owner, proxy detection, owner-only functions, price/liquidity/FDV). The Base prefix separates it from the arbitrum/eth/optimism/polygon/solana snapshot siblings, but it never distinguishes itself from token_risk_check, which sounds like an overlapping capability.

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?

Usage is implied by 'rug check and due-diligence' and the 'facts only, no buy or sell opinion' scope framing, but there is no explicit when-to-use or when-to-avoid, and no pointer to token_risk_check or base_contract_info as the alternative for narrower questions.

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