README - replace code snippets with examples - direct execution and display utilities (#1137)

examples/snippets/servers/direct_execution.py

@@ -0,0 +1,27 @@
+"""Example showing direct execution of an MCP server.
+
+This is the simplest way to run an MCP server directly.
+cd to the `examples/snippets` directory and run:
+    uv run direct-execution-server
+    or
+    python servers/direct_execution.py
+"""
+
+from mcp.server.fastmcp import FastMCP
+
+mcp = FastMCP("My App")
+
+
+@mcp.tool()
+def hello(name: str = "World") -> str:
+    """Say hello to someone."""
+    return f"Hello, {name}!"
+
+
+def main():
+    """Entry point for the direct execution server."""
+    mcp.run()
+
+
+if __name__ == "__main__":
+    main()

examples/snippets/servers/structured_output.py

@@ -1,5 +1,7 @@
 """Example showing structured output with tools."""
 
+from typing import TypedDict
+
 from pydantic import BaseModel, Field
 
 from mcp.server.fastmcp import FastMCP
@@ -27,3 +29,69 @@ def get_weather(city: str) -> WeatherData:
         condition="sunny",
         wind_speed=5.2,
     )
+
+
+# Using TypedDict for simpler structures
+class LocationInfo(TypedDict):
+    latitude: float
+    longitude: float
+    name: str
+
+
+@mcp.tool()
+def get_location(address: str) -> LocationInfo:
+    """Get location coordinates"""
+    return LocationInfo(latitude=51.5074, longitude=-0.1278, name="London, UK")
+
+
+# Using dict[str, Any] for flexible schemas
+@mcp.tool()
+def get_statistics(data_type: str) -> dict[str, float]:
+    """Get various statistics"""
+    return {"mean": 42.5, "median": 40.0, "std_dev": 5.2}
+
+
+# Ordinary classes with type hints work for structured output
+class UserProfile:
+    name: str
+    age: int
+    email: str | None = None
+
+    def __init__(self, name: str, age: int, email: str | None = None):
+        self.name = name
+        self.age = age
+        self.email = email
+
+
+@mcp.tool()
+def get_user(user_id: str) -> UserProfile:
+    """Get user profile - returns structured data"""
+    return UserProfile(name="Alice", age=30, email="alice@example.com")
+
+
+# Classes WITHOUT type hints cannot be used for structured output
+class UntypedConfig:
+    def __init__(self, setting1, setting2):
+        self.setting1 = setting1
+        self.setting2 = setting2
+
+
+@mcp.tool()
+def get_config() -> UntypedConfig:
+    """This returns unstructured output - no schema generated"""
+    return UntypedConfig("value1", "value2")
+
+
+# Lists and other types are wrapped automatically
+@mcp.tool()
+def list_cities() -> list[str]:
+    """Get a list of cities"""
+    return ["London", "Paris", "Tokyo"]
+    # Returns: {"result": ["London", "Paris", "Tokyo"]}
+
+
+@mcp.tool()
+def get_temperature(city: str) -> float:
+    """Get temperature as a simple float"""
+    return 22.5
+    # Returns: {"result": 22.5}