Power Platform Community Forum Thread Details

I create an agent named AgentX in Copilot Studio. AgentX consumes External Agent from Microsoft Fabric Data Agent named xFDA. In Microsoft Fabric, xFDA can run well. However, when I test the agent in Copilot studio, agent cannot return any response. I check in Activity (pict 1). In Activity, agent can return the response correctly (pict 2). But in test pane, agent does not show any feedback (pict 3). How to resolve this problem?

Categories:

Bot analytics

Model context protocol

Hi @CU05110824-0,

Copilot Studio shows tool calls + results in Activity, but the Test pane is blank. Why?
This usually means the agent got data from the external tool (Fabric Data Agent/MCP) but didn’t render a user message, often due to how the Fabric agent is connected, permissions/tenant alignment, or because the agent flow never “sends a response.”

Did you try the below troubleshoot, if not can you try it please?

Connect Fabric Data Agent as a Connected Agent (not the “Data Agent MCP server” tool). After Microsoft’s updates, the supported path is: Agents → Connected agents → Add → Fabric Data Agent, then pick your published Fabric agent.
Meet Fabric pre‑reqs (preview): Fabric capacity (F2+/P1+), enable tenant switches (Data Agent + Cross‑geo processing/storing), same tenant + account for Fabric and Copilot Studio, and you must have access to the underlying data sources.
Publish the Fabric Data Agent (with description) and verify it answers inside Fabric first—then attach it in Copilot Studio.
Ensure the Copilot flow actually returns a message: add a Message/“Send response”/End‑conversation node after the tool call so the output is surfaced to the user. Blank test panes commonly happen when the orchestration stops after a tool action and never emits a reply.
Check DLP/permissions: in several cases the Fabric Data Agent worked in Fabric but Copilot showed “feature not enabled”/no output until DLP and environment permissions matched. Try another environment or relax DLP as a test.

If you still see nothing, capture a run from Activity and compare tool output vs. last node—if there’s no “message to user,” the agent won’t display anything even though the tool ran.

References:
https://learn.microsoft.com/en-us/fabric/data-science/data-agent-microsoft-copilot-studio

https://community.powerplatform.com/forums/thread/details/?threadid=68698596-7953-f011-877b-7c1e5248e2ba

https://microsoftlearning.github.io/mslearn-copilotstudio/Instructions/Labs/05-manage-nodes.html

https://dellenny.com/debugging-and-testing-your-copilot-studio-bots-efficiently/

https://community.powerplatform.com/forums/thread/details/?threadid=68698596-7953-f011-877b-7c1e5248e2ba

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