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

With no annotations, the description carries the full load and does well: it discloses the paid x402 flow ('$0.01 USDC on Base'), the read-only, facts-only nature of the output, and the fact that the price/liquidity figures come from a specific pool source (deepest WPOL or USDC Uniswap v3 pool). It stops short of covering failure modes or what happens when no qualifying pool exists.

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 purpose, then the return payload, then the disclaimer and price. The long enumeration of output fields is justified since there is no output schema, though the single mega-sentence of fields could be broken up for faster scanning.

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?

Because there is no output schema and no annotations, the description must cover both returns and cost/auth behavior, and it does: it names every major returned field group and the payment mechanism. Remaining gaps are error handling and score methodology, which are secondary for a lookup tool.

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?

Only one parameter and the schema already documents it at 100% coverage ('Token contract address on Polygon PoS'). The description reinforces that this is an ERC-20 on Polygon PoS but adds no format, constraint, or edge-case guidance 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?

States a specific verb+resource pair ('Rug check and due-diligence snapshot of an ERC-20 token on Polygon PoS') and then enumerates exactly what the snapshot contains: risk score, token metadata, ownership status, proxy detection, bytecode-level owner functions, and DEX pricing. The chain name in the title and the explicit 'ERC-20 on Polygon PoS' scope separate it from its arbitrum/eth/optimism/base counterparts.

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 phrase 'rug check and due-diligence' plus 'Facts only, no buy or sell opinion' implies the pre-trade screening use case, but the description never states when to pick this over polygon_contract_info, token_risk_check, or prepayment_safety_check_lite. Usage is inferable rather than directed.

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