{
    "action": "tool_call",
    "reasoning": "I need to extract and rank the strongest correlations from the table_correlations table. The matrix_json contains correlation matrices as JSON arrays, and columns_json contains the column names. I'll parse these JSON structures to unnest the matrix and find the top correlations, excluding self-correlations.",
    "tool": "query_sql",
    "purpose": "Extract and rank the strongest correlations from the correlation matrices",
    "sql": "WITH parsed AS (SELECT dataset_id, tables_catalog_id, method, columns_json::JSON AS cols, matrix_json::JSON AS matrix FROM raw.table_correlations), expanded AS (SELECT dataset_id, tables_catalog_id, method, cols, matrix, i.idx AS row_idx, j.idx AS col_idx, matrix[i.idx][j.idx]::DOUBLE AS corr_value FROM parsed, LATERAL (SELECT UNNEST(GENERATE_SERIES(0, JSON_ARRAY_LENGTH(matrix) - 1)) AS idx) i(idx), LATERAL (SELECT UNNEST(GENERATE_SERIES(0, JSON_ARRAY_LENGTH(matrix) - 1)) AS idx) j(idx) WHERE i.idx < j.idx AND matrix[i.idx][j.idx] IS NOT NULL) SELECT cols[row_idx]::VARCHAR AS column_1, cols[col_idx]::VARCHAR AS column_2, corr_value AS correlation, method, dataset_id FROM expanded WHERE ABS(corr_value) > 0.5 ORDER BY ABS(corr_value) DESC LIMIT 50"
}