Update tool_config.json

tool_config.json

@@ -1,5 +1,7 @@
 {
   "description": "This is a tool that creates a video according to a text description. It takes an input named `prompt` which contains the image description, as well as an optional input `seconds` which will be the duration of the video. The default is of two seconds. The tool outputs a video object.",
   "name": "video_generator",
-  "tool_class": "text_to_video.TextToVideoTool"
+  "tool_class": "text_to_video.TextToVideoTool",
+  "inputs": {"prompt": "str"},
+  "output_type": "video"
 }