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dotnet/samples/GettingStarted/FoundryAgents/FoundryAgents_Step11_AsFunctionTool/README.md

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+# Using AI Agents as Function Tools (Nested Agents)
+
+This sample demonstrates how to expose an AI agent as a function tool, enabling nested agent scenarios where one agent can invoke another agent as a tool.
+
+## What this sample demonstrates
+
+- Creating an AI agent that can be used as a function tool
+- Wrapping an agent as an AIFunction
+- Using nested agents where one agent calls another
+- Managing multiple agent instances
+- Managing agent lifecycle (creation and deletion)
+
+## Prerequisites
+
+Before you begin, ensure you have the following prerequisites:
+
+- .NET 10 SDK or later
+- Azure Foundry service endpoint and deployment configured
+- Azure CLI installed and authenticated (for Azure credential authentication)
+
+**Note**: This demo uses Azure CLI credentials for authentication. Make sure you're logged in with `az login` and have access to the Azure Foundry resource. For more information, see the [Azure CLI documentation](https://learn.microsoft.com/cli/azure/authenticate-azure-cli-interactively).
+
+Set the following environment variables:
+
+```powershell
+$env:AZURE_FOUNDRY_PROJECT_ENDPOINT="https://your-foundry-service.services.ai.azure.com/api/projects/your-foundry-project" # Replace with your Azure Foundry resource endpoint
+$env:AZURE_FOUNDRY_PROJECT_DEPLOYMENT_NAME="gpt-4o-mini"  # Optional, defaults to gpt-4o-mini
+```
+
+## Run the sample
+
+Navigate to the FoundryAgents sample directory and run:
+
+```powershell
+cd dotnet/samples/GettingStarted/FoundryAgents
+dotnet run --project .\FoundryAgents_Step11_AsFunctionTool
+```
+
+## Expected behavior
+
+The sample will:
+
+1. Create a "JokerAgent" that tells jokes
+2. Wrap the JokerAgent as a function tool
+3. Create a "CoordinatorAgent" that has the JokerAgent as a function tool
+4. Run the CoordinatorAgent with a prompt that triggers it to call the JokerAgent
+5. The CoordinatorAgent will invoke the JokerAgent as a function tool
+6. Clean up resources by deleting both agents
+