The MCP Python SDK provides a comprehensive implementation of the Model Context Protocol, designed to facilitate standardized and secure communication between applications and large language models (LLMs). It supports building MCP servers that expose resources, invoke tools, and manage prompts, with capabilities like identity tracking to enhance security. The SDK also allows creating MCP clients, integrating with existing applications, and implementing custom protocol handling. Features include connection management, protocol compliance, and message lifecycle handling, making it suitable for developing scalable and compliant LLM applications that require client identification and resource management.