Why would you add other requirements?
James 2
18
Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works.
But Jesus did clarify what the works of God really are didn't He.
John 6:29 Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.