ms에 예제 따라 구현

Program.cs

@@ -1,7 +1,40 @@
-internal class Program
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using ModelContextProtocol.Server;
+using System.ComponentModel;
+
+internal class Program
 {
-    private static void Main(string[] args)
+    private static async Task Main(string[] args)
     {
-        Console.WriteLine("Hello, World!");
+        var builder = Host.CreateApplicationBuilder(args);
+        builder.Logging.AddConsole(consoleLoggerOptions =>
+        { 
+            consoleLoggerOptions.LogToStandardErrorThreshold = LogLevel.Trace;
+        });
+
+        builder.Services.
+            AddMcpServer().
+            WithStdioServerTransport().
+            WithToolsFromAssembly();
+
+        await builder.Build().RunAsync();
+    }
+}
+
+[McpServerToolType]
+public static class EchoTool
+{
+    [McpServerTool, Description("Echoes the message back to the client.")]
+    public static string Echo(string message) => $"Hello from C#: {message}";
+
+    [McpServerTool, Description("Echoes in reverse the message sent by the client.")]
+    public static string ReverseEcho(string message)
+    {
+        char[] charArray = message.ToCharArray();
+        Array.Reverse(charArray);
+        var reversed = new string(charArray);
+        return reversed;
     }
 }