Update lifecycle documentation examples with description field

Author: dsp-ant

docs/specification/draft/basic/lifecycle.mdx

@@ -73,6 +73,7 @@ The client **MUST** initiate this phase by sending an `initialize` request conta
       "name": "ExampleClient",
       "title": "Example Client Display Name",
       "version": "1.0.0",
+      "description": "An example MCP client application",
       "icons": [
         {
           "src": "https://example.com/icon.png",
@@ -111,6 +112,7 @@ The server **MUST** respond with its own capabilities and information:
       "name": "ExampleServer",
       "title": "Example Server Display Name",
       "version": "1.0.0",
+      "description": "An example MCP server providing tools and resources",
       "icons": [
         {
           "src": "https://example.com/server-icon.svg",