def optimize_tool(speed, feed_rate, depth_of_cut, material):
    try:
        tool_life = 1000 / (speed * feed_rate * depth_of_cut)
        recommended_speed = 0.8 * speed
        recommended_feed_rate = 0.9 * feed_rate

        return {
            "Estimated Tool Life (hrs)": round(tool_life, 2),
            "Recommended Speed (m/min)": round(recommended_speed, 2),
            "Recommended Feed Rate (mm/rev)": round(recommended_feed_rate, 2),
        }
    except Exception as e:
        return {"Error": str(e)}