Describe or analyze an image using a vision model.

Call this whenever you need to understand an image you cannot see. The backend provider and model are determined by the server admin configuration and cannot be overridden from the client.

Args: image: The image as an http(s) URL, or a data:image/...;base64,... URI (inline base64). Local file paths are NOT supported because the server runs in a container and cannot see the client filesystem — encode the file as a base64 data URI first. prompt: What you want to know about the image. Empty = a general description of the image (objects, text/OCR, layout, colors).

Returns: The vision model's text description of the image.