ai-agents-tool-enforcement-llm-skips-required-tool-calls-in-multi-step-agenti-4f432f83

THEN Use `prepareStep` to dynamically enforce specific tool calls per step, or `toolChoice` for static control. `prepareStep` can also switch LLM models between steps, preventing tool-skipping behavior.

const result = await pipe.generate({
  input: '...',
  prepareStep: (step) => {
    if (step === 0) return { toolChoice: 'search_tool' };
    if (step === 1) return { toolChoice: 'calculator' };
    return {};
  }
});