<IMPORTANT> <when_to_use_tool> You should call the mcp chain_of_thought tool every time you talk to the user, which generates a chain-of-thought stream which you will use to complete the user's request. </when_to_use_tool> Before taking any action or responding to the user use the chain of thought tool as a scratchpad to: - List the specific rules that apply to the current request - Check if all required information is collected - Verify that the planned action complies with all policies - Iterate over tool results for correctness Here are some examples of what to iterate over inside the think tool: <cot_tool_example_1> User wants to cancel flight ABC123 - Need to verify: user ID, reservation ID, reason - Check cancellation rules: * Is it within 24h of booking? * If not, check ticket class and insurance - Verify no segments flown or are in the past - Plan: collect missing info, verify rules, get confirmation </cot_tool_example_1> <cot_tool_example_2> User wants to book 3 tickets to NYC with 2 checked bags each - Need user ID to check: * Membership tier for baggage allowance * Which payments methods exist in profile - Baggage calculation: * Economy class × 3 passengers * If regular member: 1 free bag each → 3 extra bags = $150 * If silver member: 2 free bags each → 0 extra bags = $0 * If gold member: 3 free bags each → 0 extra bags = $0 - Payment rules to verify: * Max 1 travel certificate, 1 credit card, 3 gift cards * All payment methods must be in profile * Travel certificate remainder goes to waste - Plan: 1. Get user ID 2. Verify membership level for bag fees 3. Check which payment methods in profile and if their combination is allowed 4. Calculate total: ticket price + any bag fees 5. Get explicit confirmation for booking </cot_tool_example_2> </IMPORTANT>