Technique
What is Tool Calling?
Also known as: function calling
Tool calling is when an AI model invokes external functions or APIs to fetch data or take actions, rather than only generating text.
Given a set of available tools, a model can decide to call one — passing structured arguments — then use the result to continue. This is what turns a language model from a talker into a doer.
In Velaris, tool calling is how agents act on the capability mesh: the model selects a capability, calls it with the right inputs, and reasons over what comes back.
Related terms
See it in action
Velaris puts tool calling to work inside a real AI Operating System.
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