How to enable file search for realtime conversation?

[TypeDefinition]

Hi there! I am trying to give my realtime AI some files to reference so that it can get background knowledge of the character it is playing. I am able to upload the files and create a vector store, but I am not sure how to enable the AI to access the vector store.

Currently, this is how I am trying to get the AI to use file search:

private void GetNextActorReponse() {
    // Request the next actor to send a reply.
    int index = actorResponseOrder.Dequeue();
    List<OpenAI.Tool> fileSearchTools = new List<OpenAI.Tool>();
    fileSearchTools.Add(OpenAI.Tool.FileSearch);
    RealtimeResponseCreateParams realtimeResponseCreateParams = new RealtimeResponseCreateParams(tools: fileSearchTools, toolChoice: "{\"type\": \"function\", \"function\": {\"name\": \"file_search\"}}");
    actorSessions[index].SendAsync(new CreateResponseRequest(realtimeResponseCreateParams), destroyCancellationToken);
}

But I am getting the error:

ArgumentException: The specified tool choice '{"type": "function", "function": {"name": "file_search"}}' was not found in the list of tools

Any help would be greatly appreciated, thanks!

[StephenHodgson]

I'm unsure if it works for realtime. Only assistants

[TypeDefinition]

Ah I see, thanks :")