Call ads.create_conversion_action

Create the measurement a Google Ads campaign optimises toward — 'set up a conversion action', 'add a conversion goal for Performance Max'. Create a Google Ads conversion action for this brand — the measurement a campaign optimises toward — and report what Google read back afterwards. It spends nothing: it creates no budget and attaches to no campaign. A Performance Max campaign needs one before it can bid. Reuse the same idempotency_key on a retry so a retry cannot create a second one. Not for choosing which Google Analytics conversions the brand reports — that is connections.set_conversion_events. Over the API it answers in two calls: without confirmation_id it proposes — says what would happen, returns a confirmation_id and changes, spends and sends nothing; the same arguments again with that confirmation_id, on a member's own API key, do it.

Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with workspace_ambiguous and lists the choices — offer them, never pick one.