{
    "action": "tool_call",
    "reasoning": "I need to identify the main categorical columns across the key tables. From the evidence, I've already seen language and user_id/beer_id distributions in beer_ratings, and style_id in beers. I should check for other important categorical dimensions like beer styles (need the actual style names, not just IDs), place types, countries, and user-related categories. Let me start by getting the beer_styles table to map those style_id values to actual names.",
    "tool": "inspect_columns",
    "args": {
        "table": "beer_styles"
    }
}