How do you prevent a user from using your "Search Tool" to look up internal sensitive data they shouldn't have access to?

How does asking the model to "Respond as a panel of three experts (a coder, a security lead, and a PM)" differ from asking it to "Respond as a Senior Engineer"?

Explain the "Reflection" pattern. How can asking a model to "review your own work for errors" before showing it to the user improve quality?

A large prompt (10k tokens) is being sent every time a user asks a simple "Yes/No" question. How would you optimize this to save 90% of your API costs?