**Describe the bug** When using Dotprompt with tools, the prompt playground doesn't properly resolve them. **To Reproduce** Steps to reproduce the behavior: 1. Define a tool using `defineTool` 2. Activate the Dotprompt plugin 3. Write a `.prompt` that includes `tools: nameOfTool` 4. Open Genkit UI and try to run the prompt **Expected behavior** The prompt executes including tool calling. **Actual behavior** The prompt errors with: ``` Error: INVALID_ARGUMENT: Schema validation failed. Parse Errors: - tools.0: must be object ```