Circle with Center, Radius and Direction Tool
Activate the tool, then:

Select a line, a ray or a segment (direction) and a point (center of the circle), then enter the radius value in the appearing input box to create the circle with given center and radius whose axis is directed as the object chosen as direction.
or

Select a plane (direction) and a point (center of the circle), then enter the radius value in the appearing input box to create a circle with given center and radius in the plane through the center of the circle, parallel to the plane chosen as direction.
