APPLIED AIGLOSSARY

ByJulian Calvo, Ed.D.Founder, DecipherU

What is Function Calling in Applied AI?

Generative AI
ByDecipherU Editorial
Version 1.0 · Published April 2026 · Last verified April 2026

A capability where the model is given a schema of available functions or tools and chooses when to invoke one, with what arguments, based on the user request. The runtime executes the function and returns the result to the model, which then writes a final response. Function calling is the foundation under most agents and copilots.

Why Function Calling Matters for Your AI or Cybersecurity Career

Every modern AI assistant uses function calling. AI engineering, AI security, and AI PM roles all need fluency in how to design and validate the function schema.

Related Applied AI Terms

A capability where the model is given a schema of available functions or tools and chooses when to invoke one, with what arguments, based on the user request. The runtime executes the function and returns the result to the model, which then writes a final response. Function calling is the foundation under most agents and copilots.

Every modern AI assistant uses function calling. AI engineering, AI security, and AI PM roles all need fluency in how to design and validate the function schema.

Last verified: April 2026?Report an inaccuracy