It's a bit like taking a prepaid voucher to a food truck window. The cashier receives the voucher, checks it against their list of valid vouchers, records that the voucher was used so they can be paid, and then gives you the food you ordered. You as the customer never get to see the exchange of money between the cashier and the payment system.
Except that you are asking for the result of it, "Hey Bobby LLM, what is the value of X" will have Bobby LLM tell you the real value of X, because Bobby LLM has access to the real value because X is permissioned for the domain that the LLM is accessed through.
If the cashier turned their screen around to show me the exchange of money, then I would certainly see it.