SmolAgents Dynamic Tools extends the open-source SmolAgents Python framework to empower LLM-based agents with dynamic tool invocation. Agents can seamlessly call a variety of pre-built tools—such as web search via SerpAPI, mathematical calculators, date and time retrieval, file system operations, and custom HTTP request handlers—based on user intent and chain-of-thought prompts. Developers can register additional tools or customize existing ones, enabling agents to handle data retrieval, content creation, computation, and external API integration within a unified interface. By evaluating tool availability at runtime, SmolAgents Dynamic Tools optimizes agent workflows, reducing hard-coded logic and improving modularity across diverse application scenarios like research assistance, automated reporting, and chatbot augmentation.