payment_method_id before calling set_default_payment_method or remove_payment_method.
Parameters
This tool takes no parameters.Returns
Each saved payment method with its ID, brand, last 4 digits, and expiry, plus acount and the ID of the default method. The default marker is looked up on a best-effort basis, so the list still comes back even if the marker is unavailable. If nothing is saved yet, it returns status: "no_payment_method" and points you to setup_payment_method.