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AIResearch preprintSeptember 18, 2026
Payment-agent research tests authorization outside the AI model
An APort-authored preprint replayed 4,371 human-written attacks across 14 models. In 68,970 matched tests at policy levels 2–4, it reports 105 transfers to prohibited recipients with model-only controls and none when a deterministic authorization check guarded tool execution.
Why it matters
Analysis
Analysis: The useful design question is where a payment policy is enforced. Test explicit recipient and amount limits at the execution boundary, with logs that distinguish a requested payment from an executed, unauthorized transfer.
What remains uncertain
This is a proponent-authored preprint using a simulated bank and one payment-tool schema. Zero observed failures in those tests does not imply zero production risk.