My answer: Read the full context. The prophets of Israel were making up lies. Micaiah reported their thinking as well as what was behind it, clearly, if there were lies, they were expelled at this point and made plain else Micaiah would have 'thwarted God' at that point. Because of that, and knowing God doesn't work against Himself, we know that perhaps some confuse this passage, but they should look at the larger picture, what was specifically accomplished (the lie was dispelled by the prophet of God Micaiah), and any confusion that might be drawn be cleared up at LEAST by the actual accomplishment (a true prophet gave a clear prophecy of demise from God). When that man was called to 'tell the truth' he is recorded as giving the above context.
No 'Augustinian, Catholic, or Calvinist' or anybody else needs to be trapped by the question. If you were, don't feel terrible, its a tough passage. It is RATHER a text that demands a careful (not careless nor thin veneer) read and interpretation of scripture.
Similarly, Satan was 'allowed' to torment Job for instance, and none of us read it as a desire of God to 'torment Job' for instance. God works 'all things' for good so His intention is always toward that end because it is His nature.
Scripture helps in other places, to grasp this passage: lying is not the instruction of the Lord as if God is capable of lying. James 1:13When tempted, no one should say, “ God is tempting me.” For God cannot be tempted by evil, nor does He tempt anyone. 14But each one is tempted when by his own evil desires he is lured away and enticed.
God cannot lie, scripture tells us plainly in Numbers 23:19, Titus 1:2 and Hebrews 16.
Whatever other thing we bring from 1 Kings 22, should not be that God lies or sends liars as representatives of Himself and His nature. Furthermore, God actually clears it up with Micaiah, who tells the truth and actually dispels, in this very text, the lie that was given. The confusion, to me, is over whether Micaiah was lying or was dispelling the lie he saw, given by all the other prophets. I believe he was describing the lie of the prophets, rather. Why? Because he was slapped right after dispelling the lie, by the chief supposed (lying) prophet. It may even be that the narrative is describing that specific prophet that slapped him. Again, the clarity of the text could be translated better, but at the very least, we can draw that Micaiah, as a messenger of God, actually dispels the lie, and that is the most important point to be drawn from the text, about God: He sent a prophet to dispel the lie. -Lon