---
title: "tool si.read.signals"
description: "a monitor, a subject, a kind or a strategy, and a window: the facts, with the coverage and the count not evaluable for the same window."
section: reference
address: /reference/tools/si-read-signals
contract: 0476e35e6e275db5
---

# tool si.read.signals

a monitor, a subject, a kind or a strategy, and a window: the facts, with the coverage and the count not evaluable for the same window.

[figure: Over MCP, si.read.signals takes SignalsInput and returns a card whose body is SignalsAnswer.]

the facts, with the coverage and the count not evaluable for the same window. The call needs the read grant at the strategy rung.



| | |
|---|---|
| input | [SignalsInput](/concepts/signalsinput) |
| result | a card whose body is [SignalsAnswer](/concepts/signalsanswer) |
| read-only | yes |
| destructive | no |
| card address | `ui://scale-intelligence/cards/SignalsAnswer` |
| HTTP route | [`/v1/read/signals`](/reference/read/signals) |





| field | type | required | note |
|---|---|---|---|
| `monitor` | `id` | no |  |
| `subject` | `id` | no |  |
| `kind` | [KindOfSignal](/concepts/kindofsignal) | no |  |
| `strategy` | `id` | no |  |
| `window` | [Window](/concepts/window) | yes |  |
| `catches` | `bool` | no | read catches instead |