The MCP tool does not save the image data as an image file. #9817
Description
Problem (one or two sentences)
The MCP tool does not save the image data as an image file. tool response is: CallToolResult(content=[ImageContent(type='image', data='/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAA..........//2Q==', mimeType='image/jpg', annotations=None, meta=None)], structured_content=None, meta=None, data=None, is_error=False)
Context (who is affected and when)
my mcp tool is:
@mcp.tool
async def text_to_image(
images_description: str
) -> ContentBlock:
"""
Generate an image based on the provided description.
Args:
images_description: The English description for generating the image. Must be in English.
Returns:
fastmcp.utilities.types.Image: The generated image object.
"""
# Test connectivity to the image generation service
if not test_url_connection(sd_url):
raise Exception("Image generation service is unavailable. Please try again later.")
try:
response = requests.post(url=sd_url, json={"prompt": images_description}, timeout=360)
response.raise_for_status()
# The following function returns the image content as base64
# def image_to_base64(image):
# # Convert the image object to a byte stream
# with io.BytesIO() as output_buffer:
# image.save(output_buffer, format="JPEG") # Adjust the format according to actual needs
# image_bytes = output_buffer.getvalue()
# # Encode the byte stream into Base64
# encoded_image_str = base64.b64encode(image_bytes).decode('utf-8')
# return encoded_image_str
image_data = response.json().get("image", "")
except Exception as e:
logger.error(e)
raise Exception("The image generation system is busy. Please try again later.")
if image_data:
# First method: pass the image as base64
image_content = ImageContent(
type="image",
data=image_data,
mimeType="image/jpg",
)
return image_content
# Second method: pass the image as binary data
# image_bytes = base64.b64decode(image_data)
# return Image(data=image_bytes, format="jpg")
else:
raise Exception("The image generation system is busy. Please try again later.")
Desired behavior (conceptual, not technical)
The tool responded normally, but it shows "no response". Possibly didn't to get the image content.
Constraints / preferences (optional)
No response
Request checklist
- I've searched existing Issues and Discussions for duplicates
- This describes a specific problem with clear context and impact
Roo Code Task Links (optional)
No response
Acceptance criteria (optional)
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Proposed approach (optional)
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Trade-offs / risks (optional)
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