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

Adds substantial context the annotations cannot carry: per-call pricing in USDC on Solana, the x402 challenge/retry protocol, and an HTTP endpoint equivalent. The annotations declare readOnlyHint=false while the description reads as a pure retrieval of precomputed deltas — that tension is explained by the payment side effect rather than a data mutation, so it is not a true contradiction, but the description never reconciles it.

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-loads purpose and scope in the first clause, then adds pricing and the payment protocol. The payment paragraph is long but earns its place given the non-obvious x402 mechanic; the HTTP endpoint line is useful but the least essential sentence.

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 paid, two-parameter tool with no output schema, the description covers purpose, result shape, cost, and the payment handshake — enough for an agent to call it correctly on the first attempt. Remaining gaps are the `id` format per kind and what the tool returns for an unknown or unchanged id.

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 0%, so the description must compensate. It effectively explains the `kind` enum by naming the three record types (judge, court, disclosure) and explains why there is no vintage parameter (the vintages are fixed and seeded), but gives no guidance on the format or identity semantics of `id` for each kind.

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 and resource with full scope: 'Changes between the two seeded quarterly vintages ... for one judge, court, or disclosure record set', and clarifies the shape of the result (added/removed/changed with before/after on changed fields only). That distinguishes it in practice from the courts_*_record siblings, though it never names them explicitly.

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?

Gives concrete invocation guidance: the two vintages are fixed and seeded, the cost is $0.01, and the exact x402 flow is spelled out — call without payment to receive the PaymentRequired challenge, then retry with payment at _meta["x402/payment"]. It does not say when to use a record tool instead (courts_judge_record / courts_court_record / courts_disclosure_record for current state), which is the one missing routing cue.

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