Best and recommended approach to call an existing Azure Function from an agent in Azure AI foundry

I'm working with agents in azure ai foundry. I've been tasked to call an existing azure function and use it as a tool from my agent. I would be helpful if someone can point the right ans recommended approach to achieve this. Been looking on internet and found several ways but it is still unclear to me wich path I should follow. Right now I'm working with foundry (standard) and with prompt agents. If I need to change my approach to code agents o even MAF