Per Session Tools Sample (#724)

samples/AspNetCoreMcpPerSessionTools/Tools/ClockTool.cs

@@ -0,0 +1,40 @@
+using ModelContextProtocol.Server;
+using System.ComponentModel;
+
+namespace AspNetCoreMcpPerSessionTools.Tools;
+
+/// <summary>
+/// Clock-related tools for time and date operations
+/// </summary>
+[McpServerToolType]
+public sealed class ClockTool
+{
+    [McpServerTool, Description("Gets the current server time in various formats.")]
+    public static string GetTime()
+    {
+        return $"Current server time: {DateTime.Now:yyyy-MM-dd HH:mm:ss} UTC";
+    }
+
+    [McpServerTool, Description("Gets the current date in a specific format.")]
+    public static string GetDate([Description("Date format (e.g., 'yyyy-MM-dd', 'MM/dd/yyyy')")] string format = "yyyy-MM-dd")
+    {
+        try
+        {
+            return $"Current date: {DateTime.Now.ToString(format)}";
+        }
+        catch (FormatException)
+        {
+            return $"Invalid format '{format}'. Using default: {DateTime.Now:yyyy-MM-dd}";
+        }
+    }
+
+    [McpServerTool, Description("Converts time between timezones.")]
+    public static string ConvertTimeZone(
+        [Description("Source timezone (e.g., 'UTC', 'EST')")] string fromTimeZone = "UTC",
+        [Description("Target timezone (e.g., 'PST', 'GMT')")] string toTimeZone = "PST")
+    {
+        // Simplified timezone conversion for demo purposes
+        var now = DateTime.Now;
+        return $"Time conversion from {fromTimeZone} to {toTimeZone}: {now:HH:mm:ss} (simulated)";
+    }
+}