{
    "action": "tool_call",
    "reasoning": "The previous query failed because it tried to cast 'n/a' strings to DECIMAL. I need to first inspect the columns to understand their actual types and then write SQL that handles non-numeric values properly. Let me inspect the table's columns to see what we're working with.",
    "tool": "inspect_columns",
    "args": {
        "table": "Largest US Venture Funding Deals Of 2023"
    }
}