How often has the communications blurred between the staffing professional, the employee, and the client? Though the employee does talk to the client, or a client-supervisor, They are obligated to speak to their company when it comes to safety concerns, hours/pay, benefits, call-ins, or the staffing company's policies. With the client, they can discuss the objective of the assignment, methods of accomplishing the tasks, and what hours to be present the next day. This "Three-way Street of communications can get blurred, and some situations can cause a time of bad communications, and hurt feelings.
There is a time when those lines of communication should be allowed to be blurred between the parties involved, but experience has shown me that the conversation must not be confusing, personal, or further damaging to any of the parties involved. If a steady flow of communications are viable for a two party discussion, it is greater important to one with three parties.
Get out and start a good relationship with your clients, with your employees, and be open to listen to both parties, as well.