How to use action_input from ConversationalAgent to ChainTool?

[jasontjahjono]

I am building a Chain Tool which is just an email-drafting LLM. It should be invoked from a Conversational Agent via Allowed Tools.
When the agent invokes this email inquiry tool, it passes down the input {action: "Email Inquiry Tool", action_input: {name: "Jason", email: "[email protected]", question: "Who's the founder of this hotel?"}

My question is: I want to use the info from the action_input in my Prompt Template in the Chain Tool. How do I do it? The variables that pop up are only "question" and "chat_history".