Find audiences, user lists and interest segments

Finds audiences usable in this account: the account's own audiences and remarketing/customer lists, plus Google's in-market and affinity interest segments when you pass a search term. Use when: you need an audience id for google_add_audience_signal, or the user asks what audiences exist. Do not use when: the user means keywords or locations — those are google_research_keywords and google_resolve_locations. Remarketing lists need a minimum size before they can be used (roughly 1,000 for Search), and the reported size is an estimate. A list that is too small is returned with its size so you can tell the user why it will not work, rather than it silently doing nothing. This is a resolver: never invent an audience id, always pass one this tool returned. If you are unsure which account, campaign or period the user means, ask them — do not guess ids or dates.