Writing MCP Servers in Rust (stdio, rmcp) (rup12.net)

A new tutorial highlights how to build robust Model Context Protocol (MCP) servers using Rust, leveraging the rmcp crate. MCP is an open protocol designed to standardize how applications supply context, tools, and resources to Large Language Models, significantly enhancing productivity by allowing coding assistants to interact with various tools and databases. While existing implementations in Python, like FastMCP, offer ease of use, the tutorial emphasizes the advantages of Rust, including improved performance, safety, and early error detection due to its compiled nature. The guide walks through the development of a simple MCP server capable of interacting with a CRUD API, showcasing critical features such as tool routing and parameter handling. Key technical details include structuring tools with proper JSON schema documentation and optimizing response management to minimize unnecessary data returned to the MCP client. This approach not only solidifies the context management of the MCP server but also enhances its usability across different coding assistants, improving the overall development experience for AI/ML applications.