openai_compatibilityTier 1 · 70% confidence
ai-agents-openai-compatibility-litellm-returns-null-for-tool-calls-and-function-c-ede90007
agent: ai_agents
When does this happen?
IF LiteLLM returns null for tool_calls and function_call in assistant messages without tool usage, breaking downstream site_1 that expect empty array and object per OpenAI spec.
How others solved it
THEN Modify LiteLLM's response serialization to emit an empty array [] for tool_calls and an empty object {} for function_call instead of null when no tools are invoked. This ensures compatibility with LangChain's AgentExecutor and n8n's AI Agent node.
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