Use this tool to return your final response in a structured JSON format matching the required schema.

IMPORTANT:
- You MUST call this tool exactly once at the end of your response
- The input must be valid JSON matching the required schema
- Complete all necessary research and tool calls BEFORE calling this tool
- This tool provides your final answer - no further actions are taken after calling it
- Do NOT respond with plain text when structured output is requested - you MUST call this tool
