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Ben Thomas
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* dotnet: refresh Foundry sample guidance Carry forward the still-relevant sample guidance and Foundry-specific documentation fixes from the old stacked sample migration work, adapted to the current repo layout and policy. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * dotnet: rename Foundry sample env vars Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * dotnet: remove persistent provider sample Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * dotnet: drop SAMPLE_GUIDELINES.md from this PR Defer the guidelines doc and its cross-link to a follow-on PR to avoid broken-link failures in CI. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * dotnet: add DefaultAzureCredential warning to remaining samples Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * dotnet: address PR review feedback Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Foundry Toolbox via MCP
This sample shows how to use a Foundry Toolbox by pointing an McpClient at the toolbox's MCP endpoint. The agent discovers the toolbox's tools at runtime and invokes them locally over MCP.
What this sample demonstrates
- Connecting to a Foundry toolbox's MCP endpoint via Streamable HTTP transport
- Injecting a fresh Azure AI bearer token (
https://ai.azure.com/.default) on every MCP request - Passing the discovered MCP tools to
AIProjectClient.AsAIAgent(...) - Optional helper to create (or replace) a sample toolbox in the project so the sample is runnable end-to-end
Prerequisites
- A Microsoft Foundry project with a toolbox configured (or let the sample create one for you)
- An authenticated Azure identity (for example, sign in with
az login)
Set the following environment variables:
$env:FOUNDRY_PROJECT_ENDPOINT="https://your-foundry-service.services.ai.azure.com/api/projects/your-foundry-project"
$env:FOUNDRY_MODEL="gpt-5.4-mini"
The sample creates a toolbox named research_toolbox in your Foundry project on
startup, then connects to its MCP endpoint at
{FOUNDRY_PROJECT_ENDPOINT}/toolboxes/research_toolbox/mcp?api-version=v{version}.
Run the sample
dotnet run