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

With no annotations, the description must carry the behavioral burden. It does disclose the most important non-obvious trait — this is a paid x402 endpoint costing $0.01 USDC with a concrete GET URL — which is genuinely valuable context. However, it never states that the operation is read-only, says nothing about payment/auth flow requirements, data freshness, or failure behavior, so the behavioral picture is only partly covered.

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?

One dense, front-loaded sentence that leads with the capability and ends with the cost/endpoint in a parenthetical. Every clause carries information; the only mild cost is that the enumeration is packed tightly, but nothing is redundant.

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 tool with no output schema and no annotations, the description does the heavy lifting by listing the return payload categories and disclosing pricing. Minor gaps remain: it doesn't explain that the address is technically optional per the schema (0 required params) or what happens on a missing/invalid 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 'address' parameter already documents EVM 0x... and Solana Base58 formats. The description adds only the implicit point that the same address is resolved across five chains and used for counterparty expansion; no format, normalization, or validation detail is added 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+resource (wallet & counterparty forensics) and enumerates exactly what is returned: native + USDC balances, nonce activity, contract vs EOA detection, and burner/Sybil risk scoring. The explicit chain list (Base, Ethereum, Arbitrum, Polygon, Solana) and the 'counterparty' scope separate it from siblings like token_rug_scan and base_escrow_audit.

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?

Multi-chain scope and the specific data types make the intended use inferable, but there is no explicit when-to-use/when-not-to-use guidance and no routing against siblings such as token_rug_scan (which likely overlaps on risk scoring). Usage is implied rather than stated.

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