Some federal agencies, including the State and Defense Departments, told their employees not to respond to an email asking for a list of tasks they completed.

Musk is "an employee of the White House Office" and "holds a position as a non-career Special Government Employee," the filing said. "Like other senior White House advisors, Mr Musk has no actual or formal authority to make government decisions himself."

Elon Musk's management style has once again sparked debate, this time for asking federal workers to provide a list of what they accomplished last week.