Exposes 17 filesystem tools over stdio, designed for Claude Desktop and similar MCP clients that need sandboxed file access. Read, write, search, and modify files within explicitly allowed directories, with built-in protections against path traversal and symlink escapes. Supports batch operations like read_multiple_files and directory_tree, plus document parsing that converts Word docs and PDFs to markdown on disk. Implements the MCP roots protocol so clients can adjust sandbox boundaries at runtime without restarting. Written in C# and ships as a dotnet global tool. Reach for this when you want Claude to work with local files but need guaranteed containment to specific folders.