Using 'toady' suggests disapproval of someone's behavior. It isn't a compliment. He's such a toady, always complimenting the manager unnecessarily.
Pro Tip 2/3
Not Just Flattery
'Toady' often implies flattery with the intention of gaining favor or advantages. She didn't just compliment the director's view; she toadied up to secure a promotion.
Pro Tip 3/3
Power Dynamics
'Toady' is mostly used in contexts where there is a clear power difference. The junior analyst was a toady to the senior management, hoping for a raise.