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Annotation-based and programmatic tool system for LangChain4j agents to execute external functions, APIs, and services. \n \n Define tools using @Tool annotations with parameter descriptions via @P , automatically registered with AI services for LLM invocation \n Supports static tool registration, dynamic tool provisioning based on context, concurrent execution, and immediate-return tools for quick responses \n Includes error handling strategies, tool execution monitoring, memory context integra