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Roger Barreto de791fb8a9 .Net: Add additional Hosted Agent Samples (#4325 )

* Add 3 new hosted agent samples: AgentWithTools, AgentWithLocalTools, AgentThreadAndHITL

- AgentWithTools: Foundry tools (MCP + code interpreter) via UseFoundryTools
- AgentWithLocalTools: Local C# function tool (Seattle hotel search) with AIProjectClient
- AgentThreadAndHITL: Human-in-the-loop with ApprovalRequiredAIFunction and thread persistence

All samples follow agent-framework conventions (net10.0, AzureCliCredential, CPM disabled).
AgentWithTools includes comprehensive README with setup guide and troubleshooting.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add root HostedAgents README, replace test_requests.py with .http, update sample READMEs

- Create root README.md with shared prerequisites, Azure AI Foundry setup,
  troubleshooting, and samples index
- Replace test_requests.py with run-requests.http in AgentThreadAndHITL
- Add pointer to root README in all 6 sample READMEs
- Trim AgentWithTools README to concise style

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix dotnet format issues in AgentWithLocalTools/Program.cs

- Add UTF-8 BOM (CHARSET)
- Sort System.ClientModel.Primitives import alphabetically (IMPORTS)
- Use target-typed new for AIProjectClient (IDE0090)
- Add internal accessibility modifier to Hotel record (IDE0040)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review: align model names and package versions

- Change default model from gpt-4.1-mini to gpt-4o-mini in AgentWithLocalTools
  (Program.cs, agent.yaml, README.md) to match existing samples
- Change README example from gpt-5.2 to gpt-4o-mini in AgentWithTools and root README
- Align AgentWithLocalTools package versions with other samples:
  Azure.AI.AgentServer.AgentFramework beta.6 -> beta.8
  Azure.AI.OpenAI 2.8.0-beta.1 -> 2.7.0-beta.2
  Microsoft.Extensions.AI.OpenAI 10.2.0-preview -> 10.1.1-preview

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Upgrade new samples to latest package versions

- Azure.AI.OpenAI: 2.7.0-beta.2 -> 2.8.0-beta.1
- Microsoft.Extensions.AI.OpenAI: 10.1.1-preview -> 10.3.0

Aligns with AgentWithHostedMCP which uses the latest versions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Pin AgentThreadAndHITL to Microsoft.Extensions.AI.OpenAI 10.1.1

Azure.AI.AgentServer.AgentFramework beta.8 was compiled against
Microsoft.Extensions.AI.Abstractions with the single-param
FunctionApprovalRequestContent.CreateResponse(bool). Version 10.3.0
changed the signature to include an optional reason parameter, causing
a binary incompatibility at runtime. Pin to 10.1.1 until the framework
is recompiled against the newer abstractions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

de791fb8a9 · 2026-03-02 10:56:28 +00:00

History

agent.yaml

.Net: Add additional Hosted Agent Samples (#4325 )

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AgentWithTools.csproj

.Net: Add additional Hosted Agent Samples (#4325 )

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Dockerfile

.Net: Add additional Hosted Agent Samples (#4325 )

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Program.cs

.Net: Add additional Hosted Agent Samples (#4325 )

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README.md

.Net: Add additional Hosted Agent Samples (#4325 )

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run-requests.http

.Net: Add additional Hosted Agent Samples (#4325 )

2026-03-02 10:56:28 +00:00

README.md

What this sample demonstrates

This sample demonstrates how to use Foundry tools with an AI agent via the UseFoundryTools extension. The agent is configured with two tool types: an MCP (Model Context Protocol) connection for fetching Microsoft Learn documentation and a code interpreter for running code when needed.

Key features:

Configuring Foundry tools using UseFoundryTools with MCP and code interpreter
Connecting to an external MCP tool via a Foundry project connection
Using AzureCliCredential for Azure authentication
OpenTelemetry instrumentation for both the chat client and agent

For common prerequisites and setup instructions, see the Hosted Agent Samples README.

Prerequisites

In addition to the common prerequisites:

An Azure AI Foundry project with a chat model deployed (e.g., gpt-5.2, gpt-4o-mini)
The Azure AI Developer role assigned on the Foundry resource (includes the agents/write data action required by UseFoundryTools)
An MCP tool connection configured in your Foundry project pointing to https://learn.microsoft.com/api/mcp

Environment Variables

In addition to the common environment variables in the root README:

# Your Azure AI Foundry project endpoint (required by UseFoundryTools)
$env:AZURE_AI_PROJECT_ENDPOINT="https://your-resource.services.ai.azure.com/api/projects/your-project"

# Chat model deployment name (defaults to gpt-4o-mini if not set)
$env:AZURE_OPENAI_DEPLOYMENT_NAME="gpt-4o-mini"

# The MCP tool connection name (just the name, not the full ARM resource ID)
$env:MCP_TOOL_CONNECTION_ID="SampleMCPTool"

How It Works

An AzureOpenAIClient is created with AzureCliCredential and used to get a chat client
The chat client is wrapped with UseFoundryTools which registers two Foundry tool types:
- MCP connection: Connects to an external MCP server (Microsoft Learn) via the project connection name, providing documentation fetch and search capabilities
- Code interpreter: Allows the agent to execute code snippets when needed
UseFoundryTools resolves the connection using AZURE_AI_PROJECT_ENDPOINT internally
A ChatClientAgent is created with instructions guiding it to use the MCP tools for documentation queries
The agent is hosted using RunAIAgentAsync which exposes the OpenAI Responses-compatible API endpoint