This parameter exposes Format Attributes in Workbench when you create a workspace:
Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that interact with the bounding box are returned.
If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.
Select this option to remove any portions of exported features outside the area of interest.
Note that the Minecraft in-game coordinate system and the coordinate system used by the FME Minecraft reader differ in axes (see Coordinate System). For example, for the coordinate (1, 2, 3) in Minecraft, you would enter the reader parameter values (1, -3) for Use Search Envelope.