---
title: "tool si.act.watch"
description: "a public entity: a watched identity, with its monitor armed."
section: reference
address: /reference/tools/si-act-watch
contract: 0476e35e6e275db5
---

# tool si.act.watch

a public entity: a watched identity, with its monitor armed.

[figure: Over MCP, si.act.watch takes WatchInput and returns a card whose body is WatchedIdentity.]

a watched identity, with its monitor armed. The call needs the act grant at the brand rung.



| | |
|---|---|
| input | [WatchInput](/concepts/watchinput) |
| result | a card whose body is [WatchedIdentity](/concepts/watchedidentity) |
| read-only | no |
| destructive | yes |
| card address | `ui://scale-intelligence/cards/WatchedIdentity` |
| HTTP route | [`/v1/act/watch`](/reference/act/watch) |





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