EKS IAM user permission

We are working on Rancher POC to administer existing EKS cluster for now. We have multiple EKS cluster spread across different AWS account. I need to request an IAM user to have this cross account access but at the same time do not want this user to have admin access across these cluster(this might also be a limitation from Corporate infrastructure team). Can someone help with the permission required for this IAM user across cluster so that I can get it requested accordingly.