What is Function Calling?
AI calling functions provided by external systems while responding, such as checking stock or creating an order, rather than just generating text.
In detail
A large language model on its own can only process text. Function calling lets the model “say” which function it wants to call and with what parameters, while a program actually executes it and returns the result to the model to continue. It is the key step in AI going from “able to talk” to “able to act”.
For example
An employee asks, “How much stock of product A is left?” The model calls the “check inventory” function with the product code, gets the result, and answers “Currently available stock: 320 units”.
How companies use it
Wrap the commonly used operations in enterprise systems into clear, safe functions, and set permissions and parameter validation for each one.
Common misconceptions
Giving AI too many or too powerful functions. Query functions can be opened first, while functions that modify or delete must be tightly controlled and keep an approval step.
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