fix(ai): align toolsToModelTools with core AI SDK's prepareToolsAndToolChoice

[iNishant]

Summary

@workflow/ai's toolsToModelTools only forwards type, name, description, and inputSchema when building LanguageModelV3FunctionTool objects. The core AI SDK's prepareToolsAndToolChoice forwards three additional properties:

• strict — enables strict schema validation on providers that support it (e.g. OpenAI)
• inputExamples — optional examples for the language model
• providerOptions — provider-specific tool options

This means tools using these properties lose them when run through DurableAgent.

This PR aligns toolsToModelTools with the core AI SDK's implementation in ai/src/prompt/prepare-tools-and-tool-choice.ts.

Changes

packages/ai/src/agent/tools-to-model-tools.ts

Before:

export function toolsToModelTools(
  tools: ToolSet
): LanguageModelV2FunctionTool[] {
  return Object.entries(tools).map(([name, tool]) => ({
    type: 'function',
    name,
    description: tool.description,
    inputSchema: asSchema(tool.inputSchema).jsonSchema,
  }));
}

After:

export async function toolsToModelTools(
  tools: ToolSet
): Promise<LanguageModelV3FunctionTool[]> {
  return Promise.all(
    Object.entries(tools).map(async ([name, tool]) => ({
      type: 'function' as const,
      name,
      description: tool.description,
      inputSchema: await asSchema(tool.inputSchema).jsonSchema,
      ...(tool.inputExamples != null
        ? { inputExamples: tool.inputExamples }
        : {}),
      providerOptions: tool.providerOptions,
      ...(tool.strict != null ? { strict: tool.strict } : {}),
    }))
  );
}

Also updates the return type from LanguageModelV2FunctionTool to LanguageModelV3FunctionTool and makes the function async to match the upstream signature change.

[changeset-bot]

🦋 Changeset detected

Latest commit: 84818d5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@workflow/ai	Patch

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[vercel]

@iNishant is attempting to deploy a commit to the Vercel Labs Team on Vercel.

A member of the Team first needs to authorize it.

[VaguelySerious]

AI review: blocking issues found

[iNishant]

@VaguelySerious good to go?

[VaguelySerious]

@iNishant Thanks for the reminder, yes. DCO is failing, could you ensure that passes? Will merge after

[iNishant]

@VaguelySerious did the DCO thing.

[VaguelySerious]

Thanks for your patience!