tool( )
Pattern
Tool Call Repair
Repair invalid tool calls using experimental_repairToolCall. Fix schema validation errors without requiring additional steps that pollute message history.
IntermediateNov 2025View the full pattern on desktop
Problems solved
- Repair malformed tool calls before retrying execution
- Fix schema validation errors with generateObject
- Avoid polluting message history with extra repair turns
- Stream repair metadata to the client as data parts
Use cases
- Agents using smaller models that misformat tool args
- Complex Zod schemas that fail first-pass validation
- Automatic tool-call error recovery
- Improving tool success rates in production agents
AI SDK APIs
streamTextconvertToModelMessagestool(useChatexperimental_repairToolCallgenerateObjectNoSuchToolError
Tags
aitoolstool-call-repairexperimental-repairToolCallschema-validationerror-handlingai-sdktool-api
Requirements
- Node.js
- 24+
- Memory
- 512MB
- Other
- OpenAI API key
Environment variables
OPENAI_API_KEYGet key
External services
openai
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