The information is simply meant for our safety and benefit. In fact, sharing it could lead to unnecessary strife, broken relationships, damaged reputations, and unfinished assignments.
In John 12:26, the Bible teaches that Jesus knew Judas was a thief. The Scripture states, "As keeper of the money bag, he [Judas Iscariot] used to help himself to what was put into it." Most interesting, there is no scriptural indication that Jesus ever confronted Judas about stealing the money. And, John 6:64states that Jesus knew who would betray Him. This observation suggests that we should be cautious about what we share. Letting someone know that they're not "pulling the wool over our eyes" is not always wise.
Jesus said in Matthew 10:16, "Stay alert. This is hazardous work I'm assigning you. You're going to be like sheep running through a wolf pack, so don't call attention to yourselves. Be as cunning as a snake, and inoffensive as a dove" (The Message Bible).
To keep us safe among "wolves," the Holy Spirit (who teaches all things) will show us which people to trust, which relationships to develop, what interactions to back off from, and what situations to be cautious in. But, we don't always have to share the information we receive. Sometimes the Holy Spirit will reveal things ... simply for our safety and benefit.