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

With no annotations provided, the description carries the full burden and does well on side-effect disclosure: it explicitly says the tool never makes a purchase, signs, transfers, repeats a payment, or calls an external paid provider. It still lacks details about authorization requirements, error conditions, and what reconciliation changes internally.

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 two sentences and front-loads the core operation before adding safety constraints. Every sentence earns its place by clarifying either purpose or side-effect boundaries.

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 tool with no annotations, no output schema, and only 33% schema description coverage, the definition is adequate but not complete. It clearly covers purpose and safety, but an agent still lacks information about return values, authorization needs, and how to interpret reconciliation outcomes.

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 only 33%, so the description must compensate. It adds conceptual meaning for all three parameters, especially that receipt_id is an existing UUID, reconcile is optional and tied to a lost facilitator response, and transaction_hash is a real already-executed Base payment hash. However, it does not fully document the receipt_id pattern, the default reconcile behavior, or the exact dependency between reconcile and transaction_hash.

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 verb and resource: 'Checks an existing UUID receipt' and optionally 'reconciles a prior Base USDC payment.' It clearly scopes the operation as receipt-checking plus optional reconciliation, but does not explicitly distinguish itself from nearby siblings such as locate_owned_receipt or reconcile_gateway_receipt.

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 gives clear usage context: use it with an existing UUID receipt, and use the optional reconcile path specifically 'if the facilitator response was lost.' It also rules out purchasing behavior, but it does not explicitly say when to prefer this over sibling tools like locate_owned_receipt or reconcile_gateway_receipt.

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