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

With no annotations, the description carries the full behavioral burden and does so richly: it discloses the three verification steps (bytecode check, CoinGecko cross-reference, on-chain totalSupply() comparison), the ALLOW/WARN/BLOCK verdict semantics, and the payment/rate-limit model (first 5 calls free, then x402 USDC on Base with a payment-required error). This is unusually complete disclosure for a mutation-free tool.

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?

The description is long but front-loaded with the core instruction before elaborating on failure modes and return values; each sentence (checks performed, verdicts, payment) adds distinct information. It could be tightened, but nothing is 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?

Despite no output schema and no annotations, the description fully explains what the tool checks, how the environment is cross-referenced, what the verdict values mean, and the payment failure path. An agent has everything needed to call it correctly and interpret results.

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 description coverage is 100%, so the baseline is 3; the description exceeds it by explaining the strategic meaning of expectedSymbol — pass it when you believe you know the token, and a mismatch is "the strongest possible signal something is wrong." It adds no extra detail for chain/address, but the expectedSymbol guidance is genuinely decision-relevant.

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 concrete verb and resource — verify a token contract address — and immediately frames the tool as a "Token Trust Oracle" with a specific scope (address-poisoning and tokenomics hallucination). An agent can tell exactly what this tool does and what failure modes it addresses without opening the 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?

Explicitly states when to call it ("BEFORE trading against, writing code that references, or reporting figures about any token contract address you were not given directly by the user") and implicitly excludes a case (addresses supplied directly by the user). No siblings exist, so no further routing is needed.

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