Streamable-HTTP support was added only to the in-process model (Microsoft.Azure.Functions.Extensions.Mcp) and not in the isolated worked model (Microsoft.Azure.Functions.Worker.Extensions.Mcp).

Create a C# .NET 9 project with Azure Queue Storage trigger template. Debug the above project. Navigate to "Workspace" view -> Expand "Local Project" node -> Expand "Functions" node -> Right click the ...