Use Start Date attribute for Communication Campaigns, but not allow users to ask about Start Dates via bot

We would like to leverage the “Start Date” attribute to be able to schedule comms campaigns for new hires, but we’ve had to disable it because the bot surfaces this information when someone asks about it. For example, I can ask when another employee started at the company. This is considered sensitive information from an InfoSec perspective as it can be used to socially engineer a user if someone were to gain access. We’d like this information to be available on the back-end, but not user facing.