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Systems

Tool Calling

Letting a model request a specific external action.

Plain-English explanation

Tool calling turns model output into structured actions such as search, database queries, file edits, API calls, or calendar updates.

Why it matters

Tool Calling matters because it affects how AI systems are designed, evaluated, priced, or trusted. Knowing the term helps you ask better questions and avoid vague implementation decisions.

  • Ask how it changes quality, cost, speed, or safety.
  • Look for concrete examples in the workflow you are building.
  • Document the tradeoff before choosing a tool or architecture.