Which capability allows AI agents to perform actions on behalf of users?

AI agents are designed to be more than just conversational bots; they can perform tasks in the real world. This is achieved by equipping them with "tools" or defining "actions" they can invoke. These tools are functions or APIs that the agent's underlying language model can choose to call based on the user's request. For example, an agent could have a tool to send an email, query a database, or book a meeting. This capability transforms the agent from a passive information provider into an active assistant that can execute tasks on behalf of the user, directly interacting with other systems and services.

A. Static responses are pre-defined answers and do not involve performing dynamic, real-world actions.

C. Logs are records of an agent's activity used for monitoring and debugging, not for performing actions.

D. Variables are used to store and manage state or data within the agent's logic, not to execute external tasks.

1. Microsoft Learn, "Add tools to an AI agent". This document explicitly states, "Tools are capabilities that you can enable for your agent, which allow it to perform a wider range of tasks." It details how to add tools like web search or custom Python functions. (Section: "Add tools to an AI agent")

2. Microsoft Learn, "Semantic Kernel - Add native functions to your agent". Semantic Kernel is a core Microsoft AI agent framework. This page explains how to create "plugins" with functions (actions) that the kernel can orchestrate. (Section: "Create a plugin with native functions")