TOOLS, AGENTS & ORCHESTRATION • 151 / 397
Move from a model that talks to a system that can inspect and act.
Tool Error
A tool error is a failure returned by an external capability.
Think of it like
Think of Tool Error like a coworker with access to a toolbox and a checklist: capability matters, but control and state matter just as much.
Real life
Assistants that book travel, search files or update tickets use concepts such as Tool Error.
SRE lens
The agent must distinguish “database unavailable” from “tool call timed out”.
Remember thisA tool error is a failure returned by an external capability.