AI engineering glossary · Agents tools MCP
What is agent trace?
Agent trace (also called Trajectory): The step-by-step record of one agent run, listing each thought, tool call, observation and model response with timings. Reading it shows exactly where an agent went wrong, which tool it misused and how much each step cost.
Agent trace: an example
In the trace, step 4 shows the agent passing 'Mumbai' to a tool that expected an airport code such as BOM.
Related terms
More Agents tools MCP terms
- Agent-to-agent protocol
- Agentic workflow
- AI agent
- Approval gate
- AutoGen
- Autonomous agent
- Best-of-N sampling
- Browser agent
Where you learn it
Agent trace is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.