[BUG] parsing error when tool_calls has array in arguments

[ianchi]

Describe the bug
If the chat history rendered in the template includes an "assistant" message that has tool_calls, if any call has arguments with an array, the parsing is done incorrectly, and is impossible to include this in the chat_history

This is the error I get when the call to Azure OpenAI is made:

'Error code: 400 - {\'error\': {\'message\': "Invalid parameter: messages with role \'tool\' must be a response to a preceeding message with \'tool_calls\'.", \'type\': \'invalid_request_error\', \'param\': \'messages.[3].role\', \'code\': None}}'

But the problem is not that the message is not in response to a previous one, but that the previous message is wrongly parsed and thus not correctly seen by ChatGPT.

this is the result of prompty.parse for the offending message:

{'role': 'user', 'content': 'lista las \u00faltimas diez ...'}

{'role': 'assistant', 'content': '## tool_calls:\\n[\\n{\\'id\\': \\'call_DfeqCkPa2on8Fu2YEnwR4aWv\\', \\'function\\': {\\'name\\': \\'get_documents\\', \\'arguments\\': \\'{\\\\n  \"top_k\": 10,\\\\n  \"sort_order\": \"desc\",\\\\n  \"filter_by_metadata\": \"{\\\\\\\\\"$or\\\\\\\\\": [{\\\\\\\\\"topics\\\\\\\\\": \\\\\\\\\"precios\\\\\\\\\"}, {\\\\\\\\\"topics\\\\\\\\\": \\\\\\\\\"defectos\\\\\\\\\"}]}\"\\\\n}\\'}, \\'type\\': \\'function\\'}\\n]'}, 

{'role': 'tool', 'tool_call_id': 'call_DfeqCkPa2on8Fu2YEnwR4aWv', 'content': 'Se detallan a continuaci\u00f3n las 10 .....'}]

As you can see the ## tool_calls: was not correctly parsed as the regex used failed with the ] in the text. It was sent as part of content instead as tool_calls array.

How To Reproduce the bug
Steps to reproduce the behavior, how frequent can you experience the bug:

1. define a tool that accepts an array and generate a prompt that makes the assistant decide to call it

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Running Information(please complete the following information):

• Promptflow Package Version using pf -v: [e.g. 0.0.102309906]
• Operating System: [e.g. Ubuntu 20.04, Windows 11]
• Python Version using python --version: [e.g. python==3.10.12]

Additional context
Add any other context about the problem here.