I'm not sure what you mean by limits. The limit I have is that it makes sense in context, for example that the character has a relationship to Odin.
Players in your games do not call in an airstrike by the Nuka dragon is a limit. The only relationship the character had was that they were a cleric with "Odin" listed on their character sheet.
I was talking about the version of this that other posters ran with and made into a plausible option.
And I was talking about the real world scenario.