Comprehensive and Detailed Explanation From Exact Extract of AgentForce Documents:

According to the AgentForce Troubleshooting and Optimization Guide, hallucinations — instances where the agent fabricates details such as weblinks or data — often occur due to issues in prompt construction or retrieved content grounding. The recommended diagnostic process involves inspecting the prompt template instructions and reviewing the resolved prompt output, including the actual retrieved knowledge chunks.

By examining these areas, the AgentForce Specialist can determine whether the hallucinated content originates from ambiguous prompt phrasing, missing grounding variables, or irrelevant retrieval results. This approach ensures an evidence-based investigation directly linked to the agent’s reasoning and generation steps.

Option A is incorrect because hallucination guardrails are defined in prompts and actions, not topic names or classification descriptions. Option C is also incorrect since simply adding “ALWAYS” to instructions does not enforce factual grounding and is not a documented troubleshooting method.

Therefore, per AgentForce best practices, the correct process is Option B – Examine the prompt instructions and contents of the chunks in the resolved prompt output.