Proding the tread of the tyre (include the rap around part that falls onto the sidewall) doesn't extrude past the furtherest part of any guard.
Before driving away from a tyre dealer, you should roll the car back anf forth (to settle the front suspension) then check the clearance line. If in doubt, either change to a narrower tyre or find another set of mags that have the TOYOTA /rwd offset.