A new agent is being developed to help customer service reps process customer requests for...

Effective Agentforce instructions must be explicit about the data format, the source of the data, and the requirements for the input. Option D is the best choice because it provides the most detail for the Large Language Model (LLM). It specifies the format (18 character ID / three-digit code), the source (conversation history or user input), and the logic/dependency (required only when the product ID is present). This level of detail prevents the agent from guessing or providing incomplete data to the underlying Salesforce action. Options A and C are too vague and could lead to errors. Option B is better but lacks the explicit "Required" tag and format details found in Option D. High-quality instructions act as a contract between the agent's natural language understanding and the structured data requirements of the Salesforce system.