It is stated in the official Bot documentation under the FAQ Section
Why doesn’t my bot see messages from other bots?
Bots talking to each other could potentially get stuck in unwelcome loops. To avoid this, we decided that bots will not be able to see messages from other bots regardless of mode.
Are there any decent bots to snapshot a picture of a bot message? Spoilt for choice with bots that will generate AI images, but when it comes to a simple snapshot there doesn’t look to be a lot.