chore: import upstream snapshot with attribution

dotnet/samples/Demos/ModelContextProtocolClientServer/MCPServer/Tools/DateTimeUtils.cs

@@ -0,0 +1,22 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.ComponentModel;
+using Microsoft.SemanticKernel;
+
+namespace MCPServer.Tools;
+
+/// <summary>
+/// A collection of utility methods for working with date time.
+/// </summary>
+internal sealed class DateTimeUtils
+{
+    /// <summary>
+    /// Retrieves the current date time in UTC.
+    /// </summary>
+    /// <returns>The current date time in UTC.</returns>
+    [KernelFunction, Description("Retrieves the current date time in UTC.")]
+    public static string GetCurrentDateTimeInUtc()
+    {
+        return DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss");
+    }
+}