Here are two options based on your requirements. The first is a punchy blurb...

https://wiki-cafe.win/index.php/The_Ding_of_Doom:_How_to_Actually_Set_Boundaries_with_Work_Notifications

Here are two options based on your requirements. The first is a punchy blurb for social media (within the 255-character limit), and the second is a longer, more detailed teaser for your site or newsletter