Server Instructions: Giving LLMs a user manual for your server

Many of us are still exploring the nooks and crannies of MCP and learning how to best use the building blocks of the protocol to enhance agents and applications. Some features, like Prompts , are frequently implemented and used within the MCP ecosystem. Others may appear a bit more obscure but have a lot of influence on how well an agent can interact with an MCP server. Server instructions fall in the latter category. The Problem Imagine you’re a Large Language Model (LLM) who just got handed a collection of tools from a database server, a file system server, and a notification server to compl