server.py
├── ToolRegistry          ← Decorator-based framework with auto schema inference
├── Meta-MCP Tools        ← MCP diagnostic, validation, formatting utilities
└── A2A Module            ← In-memory agent registry & task delegation system

@registry.tool("tool_name", "What it does")
def my_tool(param1: str, param2: int = 42) -> dict:
    """Docstring becomes tool description."""
    return {"result": param1 * param2}

pip install "mcp[cli]"
python server.py                     # stdio mode
python server.py --transport sse     # HTTP mode (port 8080)

{
  "mcpServers": {
    "toolkit": {
      "command": "python",
      "args": ["/path/to/server.py"]
    }
  }
}