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

With no annotations supplied, the description carries the load well: it discloses the exact price ($0.01 USDC on Solana per receipt), the payment-to-delivery mapping, and idempotency semantics (identical re-submissions dedupe free), which is precisely the kind of side-effect detail an agent needs before spending money. It stops short of saying whether payment is charged when the record is rejected or what auth/signing preconditions must hold.

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 compact sentences with no filler, and the cost is front-loaded ahead of what the payment buys. The colon-separated field list is efficient, though the dense single-sentence construction packs price, deliverable, and dedupe into one breath.

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 single-parameter tool with no output schema and no annotations, the description compensates by enumerating the receipt fields returned and stating the cost and dedupe behavior. The notable remaining gap is the relationship to the precheck/verify siblings and what happens on a rejected or unpaid submission.

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?

Only one parameter exists and schema description coverage is 100%, so the schema already documents the record object's fields in detail. The description reinforces that the record must be the signed per-step record you submit, but adds no format or constraint information 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?

States a specific verb+resource: issues one countersigned execution receipt for a submitted signed step record, and enumerates what the receipt contains (chain sequence, tier, hash, countersignature). It is clear what the tool produces, but it never names the sibling tools (execution_receipt_precheck, execution_receipt_verify, execution_receipt_anchor) it must be distinguished from.

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?

Usage is only implied by the requirement to submit a signed step record; there is no explicit 'use this when...' statement, no exclusion of alternatives such as execution_receipt_verify or execution_receipt_anchor, and no mention of whether execution_receipt_precheck should be run first. The dedupe clause hints at retry behavior but is not framed as guidance.

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