There is no context when the prompt doesn't include it in the model configuration

When you configure a model with context collections, search results are displayed in the messages but the model doesn't actually get the search results. Only when you include the placeholder for search results in the prompt, search results are displayed. We should:

• Have a standard prompt that is used when the prompt is empty
• Include explicit instructions for the user to include the placeholder
• (optional) Validate that the prompt includes the placeholder
• (optional) Include search results after the prompt if there is no placeholder