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  5. Tool Use
Agents & Tool Useaka Tool Calling

Tool Use

Tool use lets a model request an external operation instead of trying to produce every result from its internal parameters.

Ask Melo about this← all terms

The model emits a structured tool name and arguments that a host application validates and executes. The application returns an observation, which the model can incorporate into its next response or action.

Related terms

AI AgentAgentic WorkflowFunction CallingReAct PatternCopilot AutopilotMulti-Turn

Where Tool Use comes up

  • Gemma 4 July 2026 Update: Flash Attention 4, Tool Calling, and Vision Fixes
  • GPT-Realtime-2.1-mini: Reasoning and Tool Use at Mini Pricing — OpenAI Realtime API (July 2026)
  • ReAct Prompting: The Reasoning + Acting Pattern Behind Modern AI Agents
  • LFM2.5-230M: Liquid AI's 230M Model Built to Run Agents on Phones and Robots