Available command definitions on the actor's recency stack — the universe of verbs the parser is allowed to choose from. Pre-filtered so the parser can ignore definitions the actor can't actually fire.
The actor running the command. NL parsers may want this for disambiguation (e.g. "look at MY sword" vs "look at her sword").
The Container the actor is currently in — surface for
disambiguation. Typically a Location but may be any
Stuff & Container (a Vessel interior, etc.).
Parser-side context — what a parser may look at to decide intent.