You are buying used Denso relay 156700-2480 (first picture) to replace Toyota 90987-02022 relay. This is Japan made relay which is exact copy of your Toyota relay (last picture). Both relays (compare two pictures) are made by the same company Denso, and both relays have exact same electrical parameters, they are both environmentally sealed to prevent oxygen and moisture in contacts.
Most major AC problems in Toyota cars are described in customers complaints as AC light flashing and AC clutch working intermittently. Sticking contacts in the relay are the likely cause of the problem as identified by Toyota. Replacing the faulty relay should fix your problem.
Item is guaranteed to work perfectly or your money back. Buy with confidence.