how can I use tools in llm node of workflow?

[hh1562535601]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

I use workflow to build my app, and I need use function calling with llm node, but now llm node does not support this, and I know agent supports tools, so what should I do to solve this problem?Thanks!

2. Additional context or comments

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