Extending an AI agent’s reach beyond its internal knowledge, Tool & API Invocation is the agentic skill that enables it to call external tools, services, and APIs to obtain data or perform operations. It involves selecting an appropriate tool or interface, forming a valid request, executing the call, and using the returned result in subsequent work. This skill allows agents to access live information, interact with software systems, and create effects beyond text generation, such as querying records, triggering services, or updating digital resources. ...