---
title: "tool si.act.undo_action"
description: "the move: the inverse move."
section: reference
address: /reference/tools/si-act-undo_action
contract: 0476e35e6e275db5
---

# tool si.act.undo_action

the move: the inverse move.

[figure: Over MCP, si.act.undo_action takes UndoActionInput and returns a card whose body is Move.]

the inverse move. The call needs the act grant at the brand rung.



| | |
|---|---|
| input | [UndoActionInput](/concepts/undoactioninput) |
| result | a card whose body is [Move](/concepts/move) |
| read-only | no |
| destructive | yes |
| card address | `ui://scale-intelligence/cards/Move` |
| HTTP route | [`/v1/act/undo_action`](/reference/act/undo_action) |





| field | type | required | note |
|---|---|---|---|
| `move` | `id` | yes |  |