The correct approach is to use deterministic procedural execution with run so the verification email is triggered immediately after the account creation path succeeds. In Agent Script, declaring an action only makes it available; it does not guarantee execution. Salesforce explains that run inside reasoning.instructions executes immediately when the code path is reached, which is appropriate for mandatory follow-up logic such as sending a verification email after account creation. Option B has the wrong sequencing because the email should occur after account creation, not merely before profile setup finishes without being tied to the successful action result. Option C is weaker because it exposes the action for LLM selection rather than forcing execution.