{
    "action": "tool_call",
    "reasoning": "The dataset has clear geographic dimensions (City, Country Code, Latitude, Longitude, Locality). I've already obtained city-level distribution (step-1) and country-level distribution (step-2). Now I need to understand the locality-level distribution within cities to complete the geographic picture, and also check the spatial spread using the coordinate data.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT City, COUNT(DISTINCT Locality) as locality_count, COUNT(*) as restaurant_count FROM raw.\"Zomato Restaurant Dataset\" GROUP BY City ORDER BY restaurant_count DESC LIMIT 20",
        "purpose": "Get locality diversity within top cities to understand sub-city geographic granularity",
        "source": "raw"
    }
}