chore: import upstream snapshot with attribution

dotnet/samples/03-workflows/Declarative/FunctionTools/FunctionTools.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFrameworks>net10.0</TargetFrameworks>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <InjectIsExternalInitOnLegacy>true</InjectIsExternalInitOnLegacy>
+    <InjectSharedFoundryAgents>true</InjectSharedFoundryAgents>
+    <InjectSharedWorkflowsExecution>true</InjectSharedWorkflowsExecution>
+    <InjectSharedWorkflowsSettings>true</InjectSharedWorkflowsSettings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" />
+    <PackageReference Include="Microsoft.Extensions.Logging" />
+  </ItemGroup>
+  
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Workflows.Declarative\Microsoft.Agents.AI.Workflows.Declarative.csproj" />
+    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Workflows.Declarative.Foundry\Microsoft.Agents.AI.Workflows.Declarative.Foundry.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="FunctionTools.yaml">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

dotnet/samples/03-workflows/Declarative/FunctionTools/FunctionTools.yaml

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+#
+# This workflow demonstrates an agent that requires tool approval
+# in a loop responding to user input.
+#
+# Example input: 
+# What is the soup of the day?
+#
+kind: Workflow
+trigger:
+
+  kind: OnConversationStart
+  id: workflow_demo
+  actions:
+
+    - kind: InvokeAzureAgent
+      id: invoke_search
+      conversationId: =System.ConversationId
+      agent:
+        name: MenuAgent
+      input:
+        externalLoop:
+          when: =Upper(System.LastMessage.Text) <> "EXIT"

dotnet/samples/03-workflows/Declarative/FunctionTools/MenuPlugin.cs

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+// Copyright (c) Microsoft. All rights reserved.
+
+using System.ComponentModel;
+
+namespace Demo.Workflows.Declarative.FunctionTools;
+
+#pragma warning disable CA1822 // Mark members as static
+
+public sealed class MenuPlugin
+{
+    [Description("Provides a list items on the menu.")]
+    public MenuItem[] GetMenu()
+    {
+        return s_menuItems;
+    }
+
+    [Description("Provides a list of specials from the menu.")]
+    public MenuItem[] GetSpecials()
+    {
+        return [.. s_menuItems.Where(i => i.IsSpecial)];
+    }
+
+    [Description("Provides the price of the requested menu item.")]
+    public float? GetItemPrice(
+        [Description("The name of the menu item.")]
+        string name)
+    {
+        return s_menuItems.FirstOrDefault(i => i.Name.Equals(name, StringComparison.OrdinalIgnoreCase))?.Price;
+    }
+
+    private static readonly MenuItem[] s_menuItems =
+        [
+            new()
+            {
+                Category = "Soup",
+                Name = "Clam Chowder",
+                Price = 4.95f,
+                IsSpecial = true,
+            },
+            new()
+            {
+                Category = "Soup",
+                Name = "Tomato Soup",
+                Price = 4.95f,
+                IsSpecial = false,
+            },
+            new()
+            {
+                Category = "Salad",
+                Name = "Cobb Salad",
+                Price = 9.99f,
+            },
+            new()
+            {
+                Category = "Salad",
+                Name = "House Salad",
+                Price = 4.95f,
+            },
+            new()
+            {
+                Category = "Drink",
+                Name = "Chai Tea",
+                Price = 2.95f,
+                IsSpecial = true,
+            },
+            new()
+            {
+                Category = "Drink",
+                Name = "Soda",
+                Price = 1.95f,
+            },
+        ];
+
+    public sealed class MenuItem
+    {
+        public string Category { get; init; } = string.Empty;
+        public string Name { get; init; } = string.Empty;
+        public float Price { get; init; }
+        public bool IsSpecial { get; init; }
+    }
+}

dotnet/samples/03-workflows/Declarative/FunctionTools/Program.cs

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+// Copyright (c) Microsoft. All rights reserved.
+
+using Azure.AI.Projects;
+using Azure.AI.Projects.Agents;
+using Azure.Identity;
+using Microsoft.Extensions.AI;
+using Microsoft.Extensions.Configuration;
+using OpenAI.Responses;
+using Shared.Foundry;
+using Shared.Workflows;
+
+namespace Demo.Workflows.Declarative.FunctionTools;
+
+/// <summary>
+/// Demonstrate a workflow that responds to user input using an agent who
+/// with function tools assigned.  Exits the loop when the user enters "exit".
+/// </summary>
+/// <remarks>
+/// See the README.md file in the parent folder (../README.md) for detailed
+/// information about the configuration required to run this sample.
+/// </remarks>
+internal sealed class Program
+{
+    public static async Task Main(string[] args)
+    {
+        // Initialize configuration
+        IConfiguration configuration = Application.InitializeConfig();
+        Uri foundryEndpoint = new(configuration.GetValue(Application.Settings.FoundryEndpoint));
+
+        // Ensure sample agents exist in Foundry.
+        MenuPlugin menuPlugin = new();
+        AIFunction[] functions =
+            [
+                AIFunctionFactory.Create(menuPlugin.GetMenu),
+                AIFunctionFactory.Create(menuPlugin.GetSpecials),
+                AIFunctionFactory.Create(menuPlugin.GetItemPrice),
+            ];
+
+        await CreateAgentAsync(foundryEndpoint, configuration, functions);
+
+        // Get input from command line or console
+        string workflowInput = Application.GetInput(args);
+
+        // Create the workflow factory.  This class demonstrates how to initialize a
+        // declarative workflow from a YAML file. Once the workflow is created, it
+        // can be executed just like any regular workflow.
+        WorkflowFactory workflowFactory = new("FunctionTools.yaml", foundryEndpoint);
+
+        // Execute the workflow:  The WorkflowRunner demonstrates how to execute
+        // a workflow, handle the workflow events, and providing external input.
+        // This also includes the ability to checkpoint workflow state and how to
+        // resume execution.
+        WorkflowRunner runner = new(functions) { UseJsonCheckpoints = true };
+        await runner.ExecuteAsync(workflowFactory.CreateWorkflow, workflowInput);
+    }
+
+    private static async Task CreateAgentAsync(Uri foundryEndpoint, IConfiguration configuration, AIFunction[] functions)
+    {
+        // WARNING: DefaultAzureCredential is convenient for development but requires careful consideration in production.
+        // In production, consider using a specific credential (e.g., ManagedIdentityCredential) to avoid
+        // latency issues, unintended credential probing, and potential security risks from fallback mechanisms.
+        AIProjectClient aiProjectClient = new(foundryEndpoint, new DefaultAzureCredential());
+
+        await aiProjectClient.CreateAgentAsync(
+            agentName: "MenuAgent",
+            agentDefinition: DefineMenuAgent(configuration, functions),
+            agentDescription: "Provides information about the restaurant menu");
+    }
+
+    private static DeclarativeAgentDefinition DefineMenuAgent(IConfiguration configuration, AIFunction[] functions)
+    {
+        DeclarativeAgentDefinition agentDefinition =
+            new(configuration.GetValue(Application.Settings.FoundryModel))
+            {
+                Instructions =
+                    """
+                    Answer the users questions on the menu.
+                    For questions or input that do not require searching the documentation, inform the
+                    user that you can only answer questions what's on the menu.
+                    """
+            };
+
+        foreach (AIFunction function in functions)
+        {
+            agentDefinition.Tools.Add(function.AsOpenAIResponseTool());
+        }
+
+        return agentDefinition;
+    }
+}

dotnet/samples/03-workflows/Declarative/FunctionTools/Properties/launchSettings.json

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+{
+  "profiles": {
+    "Default": {
+      "commandName": "Project"
+    },
+    "Soup": {
+      "commandName": "Project",
+      "commandLineArgs": "\"What is the soup of the day?\""
+    }
+  }
+}