Unreal Engine 5.8's built-in MCP server (Unreal MCP plugin) — enabling it, connecting Claude Code/Cursor/Codex to a running editor, the toolset registry and tool-search model, writing custom tools in C++/Python, and the safety rules for letting an agent drive the editor. Use when setting up or debugging the Unreal MCP connection, deciding which toolsets to enable, adding project-specific MCP tools, or when a task would be better done by inspecting the live editor than by reading files.
