In an Agent plan, a plan step that may involve one or more tool calls is best described as?

• A. A concrete capability that performs a single task.
• B. A data structure used to store tool outputs.
• C. A regulatory requirement for tool usage.
• D. A plan step that may involve one or more tool calls.

Answer: (D)

In a plan for an agent, plan steps describe actions the agent will take to reach a goal. When a step may involve one or more tool calls, it’s capturing the idea that this single step can orchestrate multiple tools as part of its execution. Tools could be APIs, databases, calculators, or other services the agent uses to get information or perform actions. So a step might invoke a weather API, then a location lookup, then a task-tracking update, all within the same step, depending on what’s needed to fulfill the goal. This flexibility—combining several tool calls in one step—is what makes it the best description for a step that may involve multiple tools.

The other options describe things that don’t fit the concept of a plan step. A concrete capability that performs a single task is a single, fixed action, not the orchestration of multiple tools. A data structure used to store tool outputs is about holding results, not performing actions. A regulatory requirement is a constraint, not a description of how a plan step operates.