In a mission I am working on a Klingon science officer requests the Federation captain to beam him aboard for an important discussion.
When I tell the B/O to beam him to my Ready Room I go from my ship to a bridge map. The system sees that as 'leaving the ship' so it automatically sends an away team with me.
Will there be a way for people to select 'None' for away-team members for such situations? I can also imagine scenarios where you might want to beam to a planet or another vessel alone. You can always call for reinforcements if you need them.
You should also have the ability to send your away team back if the situation warrants it.