Open Source Tool Calling

Tool calling lets an AI model request actions from external functions, APIs, or services using structured inputs. An application interprets each request, checks it, and returns the result to the model. This connects conversational interfaces to current data and real-world operations, while making actions more predictable than relying on generated text alone. Tool calling systems often address challenges such as defining available actions, validating arguments, managing execution, and handling errors or permissions.

Open source options include libraries for defining and running tools, client integrations, protocol implementations, and gateways for registering or routing tool access. When choosing one, consider supported models and languages, security controls, documentation, license, maintenance, and how easily it fits existing services. These tools are useful to developers building assistants, agent workflows, and applications that need models to interact with external systems.