// Step 4: Prepare the final JSON response in the expected format
    const toolCallId = e.parameter.toolCallId || "{{3.message.toolCalls[].id}}"; // Use the provided toolCallId or default
    const jsonResponse = {
      results: [
        {
          toolCallId: toolCallId,
          result: freeTimes  // freeSlots now holds the calculated free time slots
        }
      ]
    };