OpenAI function calling: live prediction market data [cb0880]

tools = [{
    'type': 'function',
    'function': {
        'name': 'get_market_signal',
        'description': 'Get live prediction market signal',
        'parameters': {'type':'object','properties':{'symbol':{'type':'string','enum':['BTC','FED','ETH','CPI']}}}
    }
}]
# Function implementation:
def get_market_signal(symbol):
    import requests
    return requests.get(f'https://nexus-agent-xa12.onrender.com/v1/signals?symbol={symbol}').json()