---
title: "tool si.read.board"
description: "the board and a period: the board with every tile's numbers, each with its basis and its population."
section: reference
address: /reference/tools/si-read-board
contract: 0476e35e6e275db5
---

# tool si.read.board

the board and a period: the board with every tile's numbers, each with its basis and its population.

[figure: Over MCP, si.read.board takes BoardReadInput and returns a card whose body is BoardAnswer.]

the board with every tile's numbers, each with its basis and its population. The call needs the read grant at the tenant rung.



| | |
|---|---|
| input | [BoardReadInput](/concepts/boardreadinput) |
| result | a card whose body is [BoardAnswer](/concepts/boardanswer) |
| read-only | yes |
| destructive | no |
| card address | `ui://scale-intelligence/cards/BoardAnswer` |
| HTTP route | [`/v1/read/board`](/reference/read/board) |





| field | type | required | note |
|---|---|---|---|
| `board` | `id` | yes |  |
| `period` | [Window](/concepts/window) | no |  |