Tool API Context
Pass arbitrary context from generateText/streamText to tool execution via experimental_context. Access context in tool execute functions for dynamic behavior.
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Problems Solved
- Pass arbitrary context to tool execution
- Dynamic tool behavior based on context
- Access context in tool execute functions
- Customize tool behavior without modifying tool definition
Use Cases
- Passing user preferences to tools
- Dynamic API key management
- Context-aware tool behavior
- User-specific tool customization
AI SDK APIs
Tags
Requirements
- Node.js
- 18+
- Memory
- 512MB
- Other
- OpenAI API key
Environment Variables
OPENAI_API_KEYGet key →
External Services
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Tool Input Lifecycle Hooks
Explore tool input lifecycle hooks: onInputStart, onInputDelta, and onInputAvailable. See how to track tool input generation in real-time during streaming.


Preliminary Tool Results
Return preliminary tool results using async iterables. Stream status updates during tool execution before the final result is available.


Tool Call Repair
Repair invalid tool calls using experimental_repairToolCall. Fix schema validation errors without requiring additional steps that pollute message history.


Dynamic Tool
Create dynamic tools with runtime-generated schemas using dynamicTool. Demonstrates unit conversion tools where schema adapts based on conversion type (temperature, length, weight, currency) and supports dynamic model selection.