The ExMemo Assistant plugin enhances document management in Obsidian by using large language models (LLM) to automatically generate and update metadata for files. This includes generating tags, short descriptions, and metadata elements like titles, creation dates, and editing dates. The plugin helps users organize their notes more efficiently by avoiding redundant tags and ensuring consistency across the vault. Users can customize tag generation, description prompts, and manage content truncation to control model usage costs. The plugin also allows for on-demand metadata generation through a simple command, streamlining workflows and reducing the manual effort required for note organization and editing.