Is There a Fourth Amendment Right Not to Have a Government Agent?

Vanessa was reported to the local child protection office. A few weeks later, Vanessa has just given her two sons a bath. She lives with her son in a basement rooms in her mother's house. And a white caseworker knocks on the door because once you're under the radar now, they come to investigate your home. These caseworkers rarely, rarely get a warrant to search the home.