Agent tool calling, having issues?

Hello everyone, kinda new to building ai agents and tool calling. I am really struggling with making deepseek call tools. Sometimes tools is not callled or it's dropped in between or there is DSML error. I am kinda lost now. I have tried to make a good tool definition, exposed all the tools to deepseek there are only 4-5 tools that's it. I don't know what i am doing wrong? Can you suggest some readings/works that helped you? Any repo that I can use to learn to see better tool calling with these models? Or d