As the document says, MediaResponse contains mediaObjects property, and mediaObjects is array of mediaObject, but when I tried to put multiple mediaObjects, I got this error:
MalformedResponse at expected_inputs[0].input_prompt.rich_initial_prompt.items1.media_response: Only 1 media_object is allowed. First media_object will be used while rest will be filtered.
Then what is the point of having an array of mediaObject?