Descriptive passages are those that simply describe a historical event without giving a command or instruction on how to behave. These passages are not without benefit, and can at times show how prescriptive passages operate.
There are several passages that deal with confidentiality: Mark 1:44, Luke 5:14, and Matthew 8:4 (among others) lay a foundation for the Messianic Secret (keeping the ministry of Christ secret for a time). For example, in Mark 1:43, Jesus “strongly warns” the man he has just healed to keep the healing confidential. Instead, the man goes out and breaks confidentiality by speaking freely. What the man says is true, but the truth of a statement does not make it sharable—gossip and confidentially-breaking are not based on the truth or falsehood of statement, but on whether the information shared is protected in a special relationship. Based on Jesus’s strong warning, this was protected and confidential information, however true. Because this man broke confidentiality and gossiped all around town, Jesus could no longer enter the local towns openly because the crowds had become too large and instead had to stay in isolated places. Even then, people still came to see him from everywhere.