Comprehensive and Detailed Explanation From Exact Extract of AgentForce Documents:

According to the AgentForce Prompt Customization and Template Development Guide, when an organization wants to modify or enhance how structured data (like Salesforce records) is summarized or presented by an agent, the correct approach is to create a Record Summary custom prompt template.

Record Summary templates allow specialists to tailor how the agent interprets and communicates record information — such as opportunities, accounts, or sales summaries — ensuring the output aligns with company-specific terminology, tone, and data needs.

Option B, the Knowledge Answer template, is used when the agent must answer queries grounded in unstructured text sources (e.g., Knowledge articles), not structured CRM data. Option C, updating the standard record summary action, is not recommended because it may impact other agents or system actions globally, and Salesforce documentation advises customizing through new templates instead of overwriting defaults.

Therefore, the correct best practice is Option A – Create a Record Summary custom prompt template, providing tailored and controlled responses specific to Universal Containers’ sales summary requirements.