- Breaking down a problem into a planned execution, with executing agent providing the initial plan which includes explicit objectives such as which tools it calls and what it would consider to be a successful execution.
- The harness then executes the plan in order
- Each step that involves a tool call will be executed by breaking down the tool call into component parts: the harness interrogates the agent for a valid parameter value for the current tool argument. The tool definition contains validators for each argument. If the validator fails, the harness rewinds the conversation and injects the failure reason into the next try.
- Once the agent produces a valid response for the argument, the harness proceeds to the next argument.
- Once all the arguments have been filled, the harness calls the tool. It passes the agent's initial expected value along with the actual value, along with any errors that may have been produced and asks the agent if it is satisfied with the result. If it isn't, the agent provides a reason and the harness then retries the tool call process from the beginning rewinding the conversation and inserting the reasoning for the retry.
- The agent may request to re-plan if it discovers a flaw in its initial plan. The harness will also attempt to re-plan if the agent produces too many failures in a row.
This proves to be quite effective at reducing tool call failures. One benefit is that the sub-agent gets a perfect conversation history where it makes no mistakes. I'm not sure if it's actually better at completing tasks though, I haven't tried to benchmark it.