Azure OpenAI assistant with the retrieval tool issue

[mlariane]

Answer: {
'model': 'gpt-35-turbo-16k',
'name': 'JS Math Tutor',
'instructions': 'You are a personal math tutor. Write and run code and answer math questions.',
'tools': [{'type': 'retrieval'}]
}

Question: Details
Answer: I simply use sample code from the public gitHub repository, the important part is that I create an assistant with the retrieval tool, which is well documented in the api and has sample code in the GitHub repository, but when I run the above params, I get an error saying retrieval tools are not supported