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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 PatternClaude Managed AgentsTool Permission

Where Tool Use comes up

  • Underdog Saluki 27B: Qwen3.8-27B Squeezed Into 7.89 GB With Tool Calling Intact
  • 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