Everything is a reference/test MCP server designed to demonstrate core MCP features such as prompts, resources, and tools integration. As part of this repository’s collection of reference implementations, it showcases how MCP enables large language models to securely and selectively access tools and data sources. The Everything server provides a sandboxed environment for experimenting with prompts, embedded resources, and callable tools, illustrating typical MCP components and workflows. It serves as a baseline for testing agent behavior, policy enforcement, and explainability across tool invocation, data retrieval, and resource usage. By compiling examples of prompts, resources, and tool adapters, this server helps developers validate integration patterns across MCP SDKs and evaluate how an LLM can interact with external capabilities while maintaining defined access controls.