As a reaction, you can make any non-damaging interaction with an enemy within 5 feet of you. For example, an enemy attempts to draw their sword; you could try to disarm or prevent them from doing so. A list of examples is given below.

• An enemy attempts to grab something from their inventory.
  • I.E., They try to drink a potion.
• An enemy attempts to use a bonus action to equip a sword or another type of equipment, such as a shield.