Real estate agent duty in screening tenant

[JB B.]

HI. i have a RE agent to list my rental house. we got an application and now i asked my agent to do a background and credit check. I asked him to use a tenant screening tool i saw online that . he told me that he only does a credit check and if i wanted to use the screening tool online, i could do it myself (with approval from the applicant). 

question is : if i have a RE agent, is it his responsibility to do the credit check or can i do it  or both are ok to do this ?

Thanks.

JB