In order for an action to be recognized in TAME, it must be declared in an action clause, usually at the start of TAMEScript code so that it is understood by the compiler throughout parsing. Most interactive fiction systems have these set in stone.
Not TAME, though! You can make nearly any string into an action able to be parsed by the interpreter, but that also means that if it isn't declared, TAME doesn't know about it.
All actions have the same declaration pattern, but differ slightly with each main type. As stated earlier in the documentation, there are 5 action types: General, Transitive, Ditransitive, Modal, and Open.
Action declarations contain no executable code. Code associated with actions are handled on other elements.