What happens when an AI agent exceeds its spending cap?
Fritz let his agent Nigel pay vendors and trusted that Nigel would "know" to stop at the budget. Nigel is software with no legal capacity, so "knowing" is not a control; it is hope. When a $9,000 invoice arrived against a $5,000 ceiling, nothing in Fritz's setup stood between the request and the bank.
Tyson wired it differently. He formed a Wyoming series LLC, put a named human in as Member and Manager, and onboarded Nigel as an authorized signer with capped authority โ Nigel may submit a payment request, but the spend limit is set on the payment rail itself, the system that actually moves the funds. So when Nigel submitted the same over-cap request, the rail evaluated it against the cap and declined the instruction before any money left the account. The check sits where the money moves, not in the agent's judgment. This control depends on the rail enforcing it and is not a guarantee; a misconfigured rail is just a wish.
MoralPut the spend limit on the rail that moves the money, not in the agent's head; an over-cap request can be rejected before any funds leave the account โ where the rail enforces it.
What this does not mean. This shows where the check sits, not an outcome. It does not promise the operator is protected, can never overspend, or is shielded from a bad payment โ a cap is a configured control performed at the rail, not a guarantee, and works only as well as the rail that enforces it.
See also: FX-15 โ caps on the money path ยท FX-08 โ bounded pay.
W.S. ยง17-29-211 (Wyoming series LLC)