chore: import upstream snapshot with attribution

examples/mcpserver/parameter_descriptions.py

@@ -0,0 +1,19 @@
+"""MCPServer Example showing parameter descriptions"""
+
+from pydantic import Field
+
+from mcp.server.mcpserver import MCPServer
+
+# Create server
+mcp = MCPServer("Parameter Descriptions Server")
+
+
+@mcp.tool()
+def greet_user(
+    name: str = Field(description="The name of the person to greet"),
+    title: str = Field(description="Optional title like Mr/Ms/Dr", default=""),
+    times: int = Field(description="Number of times to repeat the greeting", default=1),
+) -> str:
+    """Greet a user with optional title and repetition"""
+    greeting = f"Hello {title + ' ' if title else ''}{name}!"
+    return "\n".join([greeting] * times)