Drywall repair guide
Loose tape may need removal and replacement rather than a layer of paint. Moisture, poor adhesion or movement can all affect a seam, so the cause matters.
What to discuss before work starts
Photograph the whole joint and describe any prior leak. Confirm the proposed repair includes sound edges and an appropriate finishing transition.
Put the scope in writing
Confirm the affected surface, repair method, finish boundaries, room access and any separate work before scheduling. The condition of concealed material can change what is needed.