Direct deposit rent bank set up questions

[Joe Xie]

One of my tenant inform me that she is switch banking, as a result, she need set up new ACH to pay the rent. The process include she initiated a try deposit into my bank account which it went through. After I told her i saw a small amount deposit into my account. She asked what was the amount as it need for her to set up the link so she can pay me monthly automatically in the future. I just not very comfortable to give out as I am worrying this kind link may enable her to pull money from my account. Am I worrying too much? None other tenants asked that step. She has been rent the house for 4 years now.