Handling tool result when there’s no real output (form filling use case)

[TomerFisher]

My use case is a chat assistant that helps users fill out a form.
• I created a tool with an input schema that matches the form fields.
• On the client side, I take the tool’s input and use it to populate the form.

The issue: The SDK requires me to return a result (output) from the tool, but in my case there isn’t really an output — the important part is just passing the input values to the form.

What’s the correct way to handle a tool like this in the Vercel AI SDK? Should I just return a dummy output, echo the inputs back, or is there a recommended pattern for “input-only” tools?

[lgrammel]

You can either return a dummy result that makes sense for the LLM or use data parts instead of remove that particular tool call/response.