Build the agent, not the whole access layer
Internal data agents are often worth building when the workflow is specific to the company. The risky part is letting that project quietly expand into credential management, query validation, source authorization, rate limits, and audit review.
OneQuery gives the internal agent a smaller contract. The agent decides what to ask and how to explain the result. OneQuery decides which source can be used, how the request executes, and what record operators can review later.
Recommended rollout
Keep the custom agent UI and planning loop. Replace direct source calls one at a time with OneQuery-backed source commands, starting with a read-only source that supports a real operational workflow.