This feature requires a paid Make account. Using this tool with a free Make account will cause it to fail.

Using the Make tool
Add the Make tool to your agent from Tools → Add tool → Make. You can also add tools directly from inside a Playbook or Integration step. Once added, you can call the Make tool from inside a Playbook or Workflow.Actions
When you connect a Make scenario, Voiceflow automatically detects and displays the input variables required by your scenario.