Add examples of icons on tools, resources, prompts, and server implementation to EverythingServer (#1096)

Co-authored-by: Stephen Halter <halter73@gmail.com>

samples/EverythingServer/Program.cs

@@ -21,7 +21,33 @@ var builder = WebApplication.CreateBuilder(args);
 ConcurrentDictionary<string, ConcurrentDictionary<string, byte>> subscriptions = new();
 
 builder.Services
-    .AddMcpServer()
+    .AddMcpServer(options =>
+    {
+        // Configure server implementation details with icons and website
+        options.ServerInfo = new Implementation
+        {
+            Name = "Everything Server",
+            Version = "1.0.0",
+            Title = "MCP Everything Server",
+            Description = "A comprehensive MCP server demonstrating tools, prompts, resources, sampling, and all MCP features",
+            WebsiteUrl = "https://github.com/modelcontextprotocol/csharp-sdk",
+            Icons = [
+                new Icon
+                {
+                    Source = "https://raw.githubusercontent.com/microsoft/fluentui-emoji/62ecdc0d7ca5c6df32148c169556bc8d3782fca4/assets/Gear/Flat/gear_flat.svg",
+                    MimeType = "image/svg+xml",
+                    Sizes = ["any"],
+                    Theme = "light"
+                },
+                new Icon
+                {
+                    Source = "https://raw.githubusercontent.com/microsoft/fluentui-emoji/62ecdc0d7ca5c6df32148c169556bc8d3782fca4/assets/Gear/3D/gear_3d.png",
+                    MimeType = "image/png",
+                    Sizes = ["256x256"]
+                }
+            ]
+        };
+    })
     .WithHttpTransport(options =>
     {
         // Add a RunSessionHandler to remove all subscriptions for the session when it ends
@@ -53,7 +79,42 @@ builder.Services
     })
     .WithTools<AddTool>()
     .WithTools<AnnotatedMessageTool>()
-    .WithTools<EchoTool>()
+    .WithTools([
+        // EchoTool with complex icon configuration demonstrating multiple icons,
+        // MIME types, size specifications, and theme preferences
+        McpServerTool.Create(
+            typeof(EchoTool).GetMethod(nameof(EchoTool.Echo))!,
+            options: new McpServerToolCreateOptions
+            {
+                Icons = [
+                    // High-resolution PNG icon for light theme
+                    new Icon
+                    {
+                        Source = "https://raw.githubusercontent.com/microsoft/fluentui-emoji/62ecdc0d7ca5c6df32148c169556bc8d3782fca4/assets/Loudspeaker/Flat/loudspeaker_flat.svg",
+                        MimeType = "image/svg+xml",
+                        Sizes = ["any"],
+                        Theme = "light"
+                    },
+                    // 3D icon for dark theme
+                    new Icon
+                    {
+                        Source = "https://raw.githubusercontent.com/microsoft/fluentui-emoji/62ecdc0d7ca5c6df32148c169556bc8d3782fca4/assets/Loudspeaker/3D/loudspeaker_3d.png",
+                        MimeType = "image/png",
+                        Sizes = ["256x256"],
+                        Theme = "dark"
+                    },
+                    // WebP format for modern browsers
+                    // Demonstrates Data URI representation with the smallest possible valid WebP image (1x1 pixel).
+                    // This will appear as a white box when rendered by a browser at 32x32
+                    new Icon
+                    {
+                        Source = "data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA=",
+                        MimeType = "image/webp",
+                        Sizes = ["32x32"]
+                    }
+                ]
+            })
+    ])
     .WithTools<LongRunningTool>()
     .WithTools<PrintEnvTool>()
     .WithTools<SampleLlmTool>()