According to the AgentForce Action Orchestration and Control Logic Guide, deterministic restrictions on action execution should be implemented using context variables and conditional filters.
By creating a context variable (e.g., AccountStatus) that pulls the customer's current status and applying a conditional filter that limits execution to cases where AccountStatus = "Active", the refund action can be programmatically restricted. This ensures the agent can only trigger the refund flow when conditions are met, providing both consistency and governance over sensitive actions.
Option A (adding instructions in a prompt) is non-deterministic - the LLM might ignore or misinterpret instructions. Option C (explaining rules in text) adds guidance but not enforcement. Only filters guarantee deterministic enforcement.
Thus, the correct answer is Option B - Use context variables with conditional filters for deterministic action control.
Reference: AgentForce Implementation Manual - "Applying Conditional Filters to Enforce Deterministic Action Logic."