Request to increase the size of alert description sent to Slack App

Customer reported that the alert description of their Slack messages are being truncated (at 1000 characters).

Per Slacks API documentation

"For best results, limit the number of characters in the text field to 4,000 characters. Ideally, messages should be short and human-readable. Slack will truncate messages containing more than 40,000 characters."

Requesting that the limitation on the alert description sent to Slack be increased, to say, 4000 characters or more?