Playground doesn't show tool results

manoctch — Fri, 31 Oct 2025 14:19:34 GMT

Hii,

I’ve created a model in Databricks that uses different tools. One of these tools generates a chart based on data read from Genie.

I’d like to visualize this chart (basically an image) in Playground, but so far I haven’t found a way to do it. At the moment, I can only see the base64 output instead of the actual chart.

Is there a way to show the images on Playground?

Thanks

Re: Playground doesn't show tool results

AbhaySingh — Mon, 03 Nov 2025 15:58:08 GMT

The Issue:

Databricks Playground typically has limited native support for rendering base64 images

directly in the chat interface. This is a known limitation in many AI playground

environments.

Potential Workarounds:

1. Use Markdown Image Syntax

If your tool returns base64 data, try formatting it as a data URI with markdown:

# In your tool's return value

image_b64 = "your_base64_string_here"

return f"![Chart](data&colon;image/png;base64,{image_b64})"

2. Return a Public URL Instead

Instead of returning base64, save the chart to a location accessible via HTTP:

# Save to DBFS and return a displayable URL

dbutils.fs.put(f"/tmp/chart_{uuid.uuid4()}.png", image_bytes)

# Return the URL or use display() in notebooks

3. Use DisplayHTML in Notebooks

If testing in a Databricks notebook (not Playground), you can use:

from IPython.display import HTML, display

display(HTML(f'<img src="data&colon;image/png;base64,{image_b64}" />'))

4. Structured Output with Content Type

Ensure your tool returns properly structured output with content type hints:

{

"type": "image",

"content": base64_string,

"mime_type": "image/png"

}

5. File Path Reference

Return a file path that can be accessed through Databricks:

# Save to a volume or DBFS location

return f"Image saved to: /Volumes/catalog/schema/volume/chart.png"

Recommended Approach:

The most reliable workaround is to:

1. Save the generated chart to a Databricks volume or DBFS

2. Return the file path in the tool response

3. View the image separately in a notebook using display(Image(path))

The Playground interface is primarily designed for text-based interactions, so rich

media rendering may require using notebooks or custom applications instead.

topic Playground doesn't show tool results in Generative AI

Playground doesn't show tool results

Re: Playground doesn't show tool results