ansible.azure.automation/roles/azure_disk/tasks/list.yml

---
- name: Build tags list
  set_fact:
    tags_list: "{{ tags_list | default([]) | union([[tag.key,tag.value]|join(':')]) }}"
  loop: "{{ lookup('dict', disk.tags | default({})) }}"
  loop_control:
    loop_var: "tag"

- name: Get disk
  azure_rm_manageddisk_info:
    ad_user: "{{ azure_ad_user | default(omit) }}"
    password: "{{ azure_password | default(omit) }}"
    subscription_id: "{{ azure_subscription_id | default(lookup('env', 'AZURE_SUBSCRIPTION_ID')) }}"
    client_id: "{{ azure_client_id | default(lookup('env', 'AZURE_CLIENT_ID')) }}"
    secret: "{{ azure_secret | default(lookup('env', 'AZURE_SECRET')) }}"
    tenant: "{{ azure_tenant | default(lookup('env', 'AZURE_TENANT')) }}"
    resource_group: "{{ disk.resource_group }}"
    tags: "{{ tags_list | default(omit) }}"
    name: "{{ disk.name | default(omit) }}"
  register: azure_disk_facts
  failed_when: false

- name: Print disk 
  debug:
    var: azure_disk_facts.disks
...