Human-in-the-Loop
Learn how to implement Human-in-the-Loop (HITL) using Microsoft Agent Framework agents.
What is Human-in-the-Loop (HITL)?#
Human-in-the-loop (HITL) lets an agent ask for human input or approval while it runs. Use it when an action is expensive, destructive, or needs judgment the agent does not have.
How can I use this?#
Microsoft Agent Framework supports two patterns, and they solve different problems.
Use interrupt-based HITL when the backend owns the decision. You mark a backend tool as approval-gated, and the agent pauses before it runs. The frontend does not need to know the tool's name.
Use tool-based HITL when the frontend owns the work. You define a tool that runs in the browser, and the agent calls it like any other tool.