So basically, I am trying to follow the simple quickstart guide on how to work with images.

from mcp.server.fastmcp import FastMCP, Image
from PIL import Image as PILImage

mcp = FastMCP("My App")


@mcp.tool()
def create_thumbnail(image_path: str) -> Image:
    """Create a thumbnail from an image"""
    img = PILImage.open(image_path)
    img.thumbnail((100, 100))
    return Image(data=img.tobytes(), format="png")

However, it does not seem straigthforward how to use this in a conversation with Claude. I have properly configured the MCP server in Claude, and those tools not using images are properly working.

Is there any way of uploading an image to Claude so that it is then used by an MCP tool?