Agents & Automation
Function Calling
A structured way for AI to trigger specific actions in connected software.
Definition
Function calling is an API feature that allows a language model to output structured requests to execute specific functions rather than generating free text. For example, instead of writing 'you should look up the customer's account,' the model can directly call a `get_customer_account(customer_id)` function, receive the result, and continue processing. This makes AI integration with existing software systems reliable and machine-readable.
Related Terms
Tool Use
The ability of an AI to use external tools — calculators, search engines, databases, APIs.
AI Agent
An AI system that can take actions, use tools, and complete multi-step tasks autonomously.
Structured Output
Instructing the AI to produce output in a specific format like JSON, a table, or a list.
API (Application Programming Interface)
A connection that lets software talk to an AI model programmatically.
Heard enough terminology — ready to talk outcomes?
We translate AI concepts into measurable business results. No upfront fees — you pay only when independently verified results are delivered.
Disclaimer
This definition is provided for educational and informational purposes only. It represents a general explanation of a technical concept and does not constitute professional, technical, or investment advice. Artificial intelligence is a rapidly evolving field; terminology, techniques, and capabilities change frequently. Coaley Peak Ltd makes no warranty as to the accuracy, completeness, or currency of the information provided. Nothing on this page should be relied upon as the sole basis for commercial, technical, legal, or investment decisions without independent professional advice.
Document reference: ISO_webpage_knowledge-base_glossary_v1
Last modified: 29 March 2026
Knowledge Base·Agents & Automation·Function Calling