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If my agent is doing multiple parallel tool calls, then is there a way in which the agent can start answering from the response of the quickest tool call and then weave into it's response the results of the tool call taking longer?

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Yes, LiveKit's Agents framework supports parallel tool calls, allowing the agent to make multiple tool calls simultaneously. This feature can improve performance for complex tasks. However, the ability to start responding based on the quickest tool call and then incorporate results from longer tool calls depends on how the agent is programmed to handle responses. You can configure this feature using the `parallel_tool_calls` boolean parameter in integrations like Groq, xAI (Grok), and Cerebras.

 Sources: <https://docs.livekit.io/agents/integrations/llm/groq/|Groq LLM integration guide | LiveKit Docs> | <https://docs.livekit.io/agents/integrations/llm/xai/|xAI LLM integration guide | LiveKit Docs> | <https://docs.livekit.io/agents/integrations/llm/cerebras/|Cerebras LLM integration guide | LiveKit Docs>

I have `parallel_tool_calls` as `True` but one tool takes longer, causing a lag, how to make the agent start responding from the tool calls that have returned their response and then bake in the response from the longer running tool call?