The 7 Silent Killers of Production AI Agents

from pydantic import BaseModel, ValidationError

class UpdateDeal(BaseModel):
    deal_id: str
    stage: Literal["open", "won", "lost"]

def call_tool(state: GraphState):
    try:
        args = UpdateDeal.model_validate_json(state["tool_call"])
        return {"validated_args": args, "error": None}
    except ValidationError as e:
        # feed the exact traceback into the self-correction node
        return {"error": str(e), "attempts": state["attempts"] + 1}

graph.add_conditional_edges("call_tool",
    lambda s: "self_correct" if s["error"] and s["attempts"] < 3 else "execute")