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

With no annotations, the description carries the full burden and does substantial work: it enumerates returned fields (PoR value, per-chain totalSupply, ratio, reserves-minus-supply, below-supply flag, coverage full/partial, feed age vs heartbeat, stale flag), flags that values are 'reported reserves, not an audit,' and discloses a paid access path ($0.003 USDC via x402). Missing are error/edge behavior when no feed exists for an asset and any rate-limit or auth detail beyond the price.

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 trigger sentence and the Input/Output breakdown are well front-loaded and information-dense. The trailing 'Example: ?asset=WBTC Price: $0.003 USDC (Base or Solana) via x402.' is a run-on that fuses a query example, a price, and settlement chains into one confusing fragment, muddying rather than clarifying.

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, yet the description enumerates essentially every returned field and the staleness logic, which is what an agent needs to interpret results. The audit caveat sets appropriate expectations. It would be complete with a note on what is returned when an asset has no matched feed or only partial chain coverage.

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 `asset` param is documented there as 'Only this asset (default all)'. The description adds the concrete enumerable value set the schema lacks, which is genuine value, but it does not specify behavior for unsupported asset strings or whether the value is case-sensitive, so it sits just at baseline-plus rather than above it.

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 check: comparing a wrapped/backed token's Chainlink Proof of Reserve value against onchain supply. The asset list (WBTC, cbBTC, TUSD, stETH, eETH) and the coverage/ratio/staleness framing clearly separate it from siblings like base_token_risk, token_report, or token_controls, which an agent can rule out without opening schemas.

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 opens with an explicit trigger: 'Use when an agent checks whether a wrapped or backed token's reported reserves cover its supply,' which is a real when-to-use condition. It also scopes usage via the supported asset set. It stops short of naming alternatives or stating when-not to use it (e.g., versus token_report for general supply/issuer context), so it is clear but not fully routing.

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