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

With no annotations, the description carries the full burden, and it does add real behavioral context: this is a paid call at $0.02 USDC and it condenses multiple on-chain facts into one verdict. However, it never states whether it is read-only, what the verdict contains, or latency/caching behavior.

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, front-loaded with the purpose before routing and cost details. Nothing is wasted, though the raw endpoint template line is somewhat implementation-oriented for an agent-facing description.

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?

There is no output schema, so the description is expected to convey what a call returns; 'aggregating on-chain facts into a single verdict' gestures at it but leaves the actual verdict shape and fields unexplained. Combined with zero annotations, a paid decision tool warrants more on permissions and output.

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% with both parameters fully described and chain constrained by an enum, so the schema already does the work. The description adds only the endpoint routing per chain, which is marginal beyond what the schema provides. Baseline 3 is appropriate.

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 states a specific decision verb and resource: a 'Pay-vs-do-not-pay decision for a payee' that aggregates on-chain facts into 'a single verdict.' This is distinctive from the raw-fact siblings (balance, tx, gas) and the narrower risk_check/trust_check tools, though it never names those alternatives directly.

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?

It discloses cost ('Pay-per-call ($0.02 USDC)') and routing, which is useful, but gives no when-to-use guidance and no exclusions relative to risk_check, trust_check, or health, which appear to be decision-adjacent siblings. The agent is left to guess which decision tool to pick.

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