Not following instructions when triggered from Power Apps flow

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Posted on by CU24031618-0

I have created an agent which reads new emails from Outlook and creates Jira tickets. It works perfectly every time I trigger it manually through Evaluation, however when triggered from the Power Apps flow the agent does not follow its instructions. This is not happening intermittently, I see the same behaviour every single time.

The flow in Power Apps looks like this: When a new email arrives (V3) -> Execute Agent

The agent's instructions tell it to call a tool to create Jira tickets and never respond conversationally.

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MichaelFP 2,001 Moderator on at

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Why you do not create an Agent flow, is better for this scenarios

https://learn.microsoft.com/microsoft-copilot-studio/flows-overview?wt.mc_id=MVP_407574

You will have more value to use that, and fits better on your requirement.

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RichAI 26 on at

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Hi @CU24031618-0,

I think the input passed from Power Automate is different from the input used during Evaluation, and the agent’s instructions are not getting interpreted in the same way.

Possible reasons can be:

1. "When a new email arrives (V3)" connector sends email body as HTML instead of plain text, Inline CSS, etc.
This can change the structure of the input the agent receives.
2. If you include attachments in the input, they are passed as large Base64 objects. This increases the prompt size and can confuse the agent’s tool‑calling behaviour. If attachments aren’t required for the Jira ticket, exclude them from what you send to the agent.
3. Sometimes the flow sends extra metadata. Check those details as well over what is being sent to the agent by creating a topic which displays the input it receivers from PA in the chat while testing the agent.
4. If the input object from the flow doesn't match what you used during manual Evaluation, the agent may get confused.

If you can share the instruction prompt, and the JSON input your flow sends into the agent, it would be much easier to spot the issue.

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