langchain4j-tool-patterns

Designs LangChain4j tool calling for Java assistants: annotated and programmatic tools with typed arguments, memory-aware context selection, authorized state changes, error handlers, streaming callbacks and bounded concurrency. Use when the user asks to "define a LangChain4j tool", "wire tools into an AI service", "add a dynamic tool provider", "let the assistant query a database or API", or handle tool errors and streaming. Not for building unrestricted SQL execution, granting the model permission to change state, exposing credentials, or performing external actions without approval.

Version

v1.0.0

Size

26 KB

Updated

2026-10-02

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