> ## Documentation Index > Fetch the complete documentation index at: https://docs.gc.ai/llms.txt > Use this file to discover all available pages before exploring further. # Update vault document cell > Correct one extracted value on one document, the way a person would fix a cell in the vault table. The MCP server is in public beta. It is open to use and still being refined, so tools and behavior may change. **Tool** `update_vault_document_cell` · **Behavior** Destructive Correct one extracted value on one document, the way a person would fix a cell in the vault table. Pass `value` to set it, or `revert: true` to undo an earlier hand edit and put the AI value back. An edit wins over any scan that lands afterwards, so there is no need to wait for a scan to finish. A column GC AI manages, and a value outside a select column's options, are both refused. ## Input parameters The vault the document is in. The row to change, from `get_vault_documents`. The column to change, from `get_vault_columns`. The value to store, in the same form the column reports it. Send an empty string to clear the cell. Omit it entirely to revert instead. Set true to drop a person’s edit and put back the value GC AI extracted. This restores the AI value rather than clearing the cell. ## Response