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
Tool Call Repair preview

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

External services

openai

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