USE THIS WHEN you have up to three documents (receipt, invoice, purchase order - any subset) and need a discrepancy list: reference, item, quantity, price, or arithmetic mismatches between them. This is the default choice for 'does this receipt match the invoice' or 'do these documents agree' questions. Links use explicit line references, exact product codes, or conservative normalized descriptions. DO NOT USE THIS if the actual question is a quantity-allocation question - how much of a PO has been invoiced, or resolving partial/split invoice lines against PO quantities. This tool does not allocate billed quantities or calculate remaining PO quantities: partial quantities are reported as plain differences, and any many-to-one (split) link is flagged ambiguous_many_to_one rather than resolved. For that, call match_invoice instead (paid, 0.50 USDC) - but you never need to call it before or after this tool; each works standalone. Free, no wallet authorization, no payment metadata accepted. Missing documents or fields are marked needs_review, never inferred. No OCR, retrieval, saved analyses, paid service calls, delivery verification, payment approval, or accounting writes. Human review required.
