When strategy loader sees this annotation for strategy class it asks user if he wants to allow the strategy full access.
If such acceptance receives strategy classes, they are loaded with full access policy allowing to read/write any files, use sockets etc.
Always try to avoid using this annotation, if only need to read/write to file - you have full access to
"~/My Documents/My Strategies/files" folder. In this folder you can read or write any file without requesting the full access.