core/homeassistant/components/matrix/strings.json

{
  "selector": {
    "send_message_data": {
      "fields": {
        "images": {
          "name": "Images",
          "description": "One or more image paths to attach to the message."
        },
        "format": {
          "name": "Message format",
          "description": "Format of the message, either 'text' or 'html'."
        },
        "thread_id": {
          "name": "Thread ID",
          "description": "An optional parent message ID to thread this message under."
        }
      }
    },
    "send_message_data_format": {
      "options": {
        "text": "Plain text",
        "html": "HTML"
      }
    }
  },
  "services": {
    "send_message": {
      "name": "Send message",
      "description": "Sends message to target room(s).",
      "fields": {
        "message": {
          "name": "Message",
          "description": "The message to be sent."
        },
        "target": {
          "name": "Target",
          "description": "A list of room(s) to send the message to."
        },
        "data": {
          "name": "Data",
          "description": "Extended information of notification."
        }
      }
    },
    "react": {
      "name": "React",
      "description": "Sends a reaction to a message.",
      "fields": {
        "message_id": {
          "name": "Message ID",
          "description": "The ID of the message to react to."
        },
        "reaction": {
          "name": "Reaction",
          "description": "The reaction to send."
        },
        "room": {
          "name": "Room",
          "description": "The room to send the reaction to."
        }
      }
    }
  }
}