Five independent agents with no central controller create a problem single agent demos never have to solve. When state changes, which agent actually caused it? @TheARCTERMINAL put five autonomous agents on Ethereum across 27 action types with onchain settlement. Attribution starts to matter there. A system receipt can prove an event happened. A multi agent system still needs to show which agent started it, which agent approved or influenced it, what state it saw, and what changed because of that action. Without that, accountability blurs as autonomy scales. The security question is shifting too. Not only did an agent act, but which agent, under whose authority, produced this outcome. Decentralization can remove the controller without removing attribution. Stronger multi agent systems need clearer causal fingerprints. If five agents help produce one bad result, should responsibility be shared or assigned to the agent that made the decisive move?