ansible.azure.automation/roles/azure_bp/tasks/main.yml

---
- name: In backendpool state
  include: "{{ item.state | default('present', true) }}.yml"
  vars:
    bp: "{{ item }}"
  when:
    - action is undefined 
    - (bps | default([], true) | length) > 0
  with_items: "{{ bps }}"

- name: Update/create backendpool
  include: present.yml
  vars:
    bp: "{{ item }}"
  when:
    - action is defined 
    - action == 'present'
    - (bps | default([], true) | length) > 0
  with_items: "{{ bps }}"

- name: Delete backendpool
  include: absent.yml
  vars:
    bp: "{{ item }}"
  when:
    - action is defined 
    - action == 'absent'
    - (bps | default([], true) | length) > 0
  with_items: "{{ bps }}"
...