-- Phase 3.1: MarketApp 增加 tool_policy（Agent 工具/MCP 权限沙箱策略）
-- 幂等：仅当列不存在时才 ALTER
SET @db = 'aiflow';
SET @tbl = 'market_apps';
SET @col = 'tool_policy';
SET @exists = (
    SELECT COUNT(*) FROM information_schema.columns
    WHERE table_schema = @db AND table_name = @tbl AND column_name = @col
);
SET @sql = IF(@exists = 0,
    'ALTER TABLE market_apps ADD COLUMN tool_policy JSON NULL',
    'SELECT 1');
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;