Your team notices a spike in failed tool calls from a deployed workflow agent after...

The selected option specifically B states “Update the tool function specifications and re-test action sequences.”, which matches the operational requirement rather than a superficial wording match. For this scenario, Option B is defensible because it exposes the control plane that a senior engineer can test, scale, and harden. Operationally, the design depends on tool contracts that can be versioned, tested, and observed independently from the reasoning loop. A schema update breaks the tool contract. The first repair is to update function specifications and retest action sequences, not adjust randomness or memory. That is why the other options are traps: manual tool wiring scales poorly as the catalog grows and usually fails silently when a vendor updates parameters or response fields. Within the NVIDIA stack, NeMo Agent Toolkit treats agents, tools, and workflows as composable functions, so tool-calling agents can choose from names, descriptions, and schemas rather than guessed endpoints. It also creates clean evidence for audits, incident review, and root-cause analysis when behavior drifts.