The Blocking Combat Action gives an ability for AI to attempt to detect and block projectiles and melee attacks, when within range of an enemy. This also works for player attacks. This also allows for the ability for an AI's attack to stop if its target is blocking and play a recoiling animation (which requires a recoil animation). There's a cooldown to control how often this action can happen.
There is an example Blocking Combat Action to help get you started. However, you might want to create your own, or have different blocking settings for different AI. You can create a new Blocking Combat Action by right clicking within the Project tab and going to Create>Emerald AI>Action>Block Action.
Note: You can also select the included example Block Combat Action and press Ctrl+D to duplicate it. This will allow you to create a copy of the example so you can retain the default settings such as the Enter, Cooldown, and Exit Condition settings.
You will then have a new Blocking Combat Action to customize through the Blocking Combat Action Editor.
Note: There are detailed tooltips for every setting. Just hover the mouse over the setting to bring up the tooltip.