The test description file is used to configure manyex to produce the exams (type of exam, which exercises to introduce, how many exams, etc.).
The test description file can be named as you wish, and its name has to be provided to the manyex command line. For instance if you call your test description file desc-test, the comand line will be:
manyex -n -f desc-test
Each command is given in a separate line. Blank space and blank lines are note taken into account and comments can be introduced by starting a line with #.