When logging object properties, always verify that the property names exactly match the actual structure of the object being logged. Incorrect property names (like 'responses' instead of 'response') or non-existent properties will result in undefined values in logs, reducing their usefulness for debugging and troubleshooting. Example of problematic code: ```javascript console.log('Responses:', result.responses); // Incorrect property name console.log('Provider Metadata:', result.providerMetadata); // Non-existent property ``` Corrected code: ```javascript console.log('Response:', result.response); // Correct property name // Don't log properties that don't exist in the object ``` Consider using optional chaining (`?.`) for nested properties or TypeScript to help catch these issues at compile time. For important logging in production code, consider adding runtime property existence checks before logging.