You wouldnt need to. If you arent asking for money for sexual services, that is not prostitution. So if you are merely providing a telephone number for a client and the ladies make their own arrangements, how could you know what they did? That defence has also been used, successfully. The cases that have been won are the cases where ladies were working inhouse, or explicitly offered for sexual services.
In any case, I think we are digressing. Wsant this about Irish agencies? I think my escort interview covers this for any interested