Special characters giving summary in discovery engine SDK but not in REST API and console

[njk]

Hi All,

We have a Vertex search and conversation app and use the discovery engine SDK to query it. We have noticed that when we use queries like "((", "))", "**", we are getting a summary.

However, when we use the same queries in REST API or console, we do not get any summary but get a message like "I am sorry, I do not understand". This is the behaviour we want from the SDK.

Please suggest how we can fix this.

[nceniza]

Can you try escaping these characters with backslash "\"? 

[njk]

I tried "\(\(" but it is not working.