The Commissioner of Children and Families, or any agent appointed by said commissioner, shall exercise careful supervision of each child under said commissioner’s guardianship or care and shall maintain such contact with the child and the child’s foster family as is necessary to promote the child’s safety and physical, educational, moral and emotional development, including, but not limited to, visiting each foster home at least once every sixty days. The commissioner shall maintain such records and accounts as may be necessary for the proper supervision of all children under said commissioner’s guardianship or care.