---
title: "tool si.read.document_changes"
description: "two versions: every number that moved with its unit, every figure replaced."
section: reference
address: /reference/tools/si-read-document_changes
contract: 0476e35e6e275db5
---

# tool si.read.document_changes

two versions: every number that moved with its unit, every figure replaced.

[figure: Over MCP, si.read.document_changes takes DocumentChangesInput and returns a card whose body is WhatChanged.]

every number that moved with its unit, every figure replaced. The call needs the read grant at the brand rung.



| | |
|---|---|
| input | [DocumentChangesInput](/concepts/documentchangesinput) |
| result | a card whose body is [WhatChanged](/concepts/whatchanged) |
| read-only | yes |
| destructive | no |
| card address | `ui://scale-intelligence/cards/WhatChanged` |
| HTTP route | [`/v1/read/document_changes`](/reference/read/document_changes) |





| field | type | required | note |
|---|---|---|---|
| `document` | `id` | yes |  |
| `first` | `count` | yes |  |
| `second` | `count` | yes |  |