---
title: "tool si.read.monitor_strength"
description: "the monitor and a window: the four numbers, each with its population."
section: reference
address: /reference/tools/si-read-monitor_strength
contract: 0476e35e6e275db5
---

# tool si.read.monitor_strength

the monitor and a window: the four numbers, each with its population.

[figure: Over MCP, si.read.monitor_strength takes MonitorStrengthInput and returns a card whose body is SignalStrength.]

the four numbers, each with its population. The call needs the read grant at the strategy rung.



| | |
|---|---|
| input | [MonitorStrengthInput](/concepts/monitorstrengthinput) |
| result | a card whose body is [SignalStrength](/concepts/signalstrength) |
| read-only | yes |
| destructive | no |
| card address | `ui://scale-intelligence/cards/SignalStrength` |
| HTTP route | [`/v1/read/monitor_strength`](/reference/read/monitor_strength) |





| field | type | required | note |
|---|---|---|---|
| `monitor` | `id` | yes |  |
| `window` | [Window](/concepts/window) | yes |  |