Telegraf kubernetes input

how can i get certain measurements from getting sent to the influxdb? i believe its tagdrop but i cant seem to get the format correct in the yaml file:

  kubernetes:
    url: "https://$HOSTNAME:10250"
    bearer_token: "/var/run/secrets/kubernetes.io/serviceaccount/token"
    insecure_skip_verify: true
    tagdrop:
      namespace:
        - "kube-system"
        - "ibm-system"