chore: import upstream snapshot with attribution

examples/snippets/servers/lowlevel/structured_output.py

@@ -0,0 +1,81 @@
+"""Run from the repository root:
+uv run examples/snippets/servers/lowlevel/structured_output.py
+"""
+
+import asyncio
+import json
+
+import mcp_types as types
+
+import mcp.server.stdio
+from mcp.server import Server, ServerRequestContext
+
+
+async def handle_list_tools(
+    ctx: ServerRequestContext, params: types.PaginatedRequestParams | None
+) -> types.ListToolsResult:
+    """List available tools with structured output schemas."""
+    return types.ListToolsResult(
+        tools=[
+            types.Tool(
+                name="get_weather",
+                description="Get current weather for a city",
+                input_schema={
+                    "type": "object",
+                    "properties": {"city": {"type": "string", "description": "City name"}},
+                    "required": ["city"],
+                },
+                output_schema={
+                    "type": "object",
+                    "properties": {
+                        "temperature": {"type": "number", "description": "Temperature in Celsius"},
+                        "condition": {"type": "string", "description": "Weather condition"},
+                        "humidity": {"type": "number", "description": "Humidity percentage"},
+                        "city": {"type": "string", "description": "City name"},
+                    },
+                    "required": ["temperature", "condition", "humidity", "city"],
+                },
+            )
+        ]
+    )
+
+
+async def handle_call_tool(ctx: ServerRequestContext, params: types.CallToolRequestParams) -> types.CallToolResult:
+    """Handle tool calls with structured output."""
+    if params.name == "get_weather":
+        city = (params.arguments or {})["city"]
+
+        weather_data = {
+            "temperature": 22.5,
+            "condition": "partly cloudy",
+            "humidity": 65,
+            "city": city,
+        }
+
+        return types.CallToolResult(
+            content=[types.TextContent(type="text", text=json.dumps(weather_data, indent=2))],
+            structured_content=weather_data,
+        )
+
+    raise ValueError(f"Unknown tool: {params.name}")
+
+
+server = Server(
+    "example-server",
+    on_list_tools=handle_list_tools,
+    on_call_tool=handle_call_tool,
+)
+
+
+async def run():
+    """Run the structured output server."""
+    async with mcp.server.stdio.stdio_server() as (read_stream, write_stream):
+        await server.run(
+            read_stream,
+            write_stream,
+            server.create_initialization_options(),
+        )
+
+
+if __name__ == "__main__":
+    asyncio.run(run())