Passing variable text to tts_cloud_say Nabu Casa

Configuration
1

I know the answer will be obvious but I have spent a couple of hours wrestling with this issue. Appreciate any help offered.

I have a multitude of automations, many of them have announcements and in each case I have built all the code for Sonos into the automation. I would like to move the bulk of the code into a script which is called by the automation and inserts the text from a variable in the automation. But I cannot get it to work.

The test script is:

  sonos_test:
    alias: "Sonos test"
    sequence:
      - service: tts.cloud_say
        data_template:
          entity_id: media_player.dining_room_sonos
          message: "{{ text_message }}"
          options:
            gender: female
          language: en-GB

The calling automation is:

automation:
  - alias: 'test'
    id: test01
    trigger:
      - platform: state
        entity_id: input_boolean.test
    action:
      - service: script.sonos_test
        data_template:
          variables:
              text_message: 'This is a test of the Sonos announcement script!'

No error messages are shown, but the trace in the script shows no text passed to the script.

Executed: March 11, 2022, 17:01:00
Result:
params:
  domain: tts
  service: cloud_say
  service_data:
    entity_id: media_player.dining_room_sonos
    message: ''
  target: {}
running_script: false
limit: 10

Any help mucho appreciated.

2

bump, anyone?