What is tool chaining?

• A. Running tools concurrently.
• B. Sequencing multiple tool calls where the output of one tool becomes the input to the next.
• C. Storing tool results for later review.
• D. Replacing a tool with a manual step.

Answer: (B)

Tool chaining means connecting tools in a sequence so the output of one becomes the input for the next. This creates a pipeline that automates multi-step tasks, letting simple tools work together to tackle more complex problems. Each step takes in data, processes or transforms it, and passes the result along to the next tool, enabling a smooth flow of information without manual intervention.

For example, you might first extract data with a fetch tool, then clean it with a processing tool, and finally summarize or analyze it with another tool—all in a single automated chain where each stage depends on the previous one. Running tools concurrently would involve parallel, not sequential, execution, which isn’t what chaining means. Storing results is just saving data, not creating a dependent sequence of tool calls. Replacing a tool with a manual step would break the automated flow and is not how chaining works.