Prevent multiple tool calls per single step

AI SDK
1

is there a way to prevent multiple tool calls per single step? For example, I set max step to be 2 and the tool I give is image generation. Now, I can ask the model to generate 4 images and it will do that, basically providing 4 tool inputs in a single step. Then it uses the second step to write something down.

Does AI sdk provide way to prevent this, or do I need to somehow do it myself? Didn’t find much in the docs.

using ai sdk v5 and my ai call is like this

      const result = streamText({
        model: aiClient(modelName),
        system: enhancedSystemPrompt,
        messages: convertToModelMessages(messages),
        maxOutputTokens,
        temperature,
        tools: {
          ...tools,
        },
        stopWhen: stepCountIs(2),
        onError: (error) => {
          console.error("Error streaming", error);
        },
      });
4

I tried setting parallel_tool_calls in providerOptions but that doesn’t seem to work.

      const result = streamText({
        model: aiClient(modelName),
        system: enhancedSystemPrompt,
        messages: convertToModelMessages(messages),
        maxOutputTokens,
        temperature,
        tools: {
          ...tools,
        },
        stopWhen: stepCountIs(2),
        providerOptions: {
          openai: {
            parallel_tool_calls: false,
          },
        },
        onError: (error) => {
          console.error("Error streaming", error);
        },
      });