Unverified50% confidenceFactExact time
The tool-calling interface is the standard mechanism for large language models to interact with external systems: the model outputs structured function names and parameters during generation, which the runtime environment executes and returns the results.
1
Sources
50%
Confidence
Long-term
Relevance
10/20/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedFunction calling (tool calling) refers to the ability of a large language model to proactively request the invocation of external functions or APIs during the generation of a response.80% similarUnverifiedInline tool definitions re-declare tools via a system message, with the effect of overriding or extending the set of tools currently available to the model.77% similarVerifiedThe tool-calling (Function Calling) mechanism allows the model to invoke external tools during reasoning, such as file read/write operations, terminal commands, and search APIs.75% similarUnverifiedTool invocation refers to an AI model's ability to call external tools (such as a code interpreter, web search, or file system operations) to assist in completing tasks75% similarUnverifiedTool calling refers to the mechanism by which an Agent requests the execution of an external function through a structured message and has the result returned; the returned content enters the conversation history as a message with role: 'tool' and from then on permanently occupies the context.75% similar
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