An important question.
I would add one further perspective.
The key issue is not simply whether AI has been used, but whether it has materially influenced decisions that affect stakeholders.
Transparency should therefore be guided less by the presence of AI than by the significance of its contribution to the decision.
When AI meaningfully shapes priorities, recommendations or outcomes, organizations should be able to explain how those insights were evaluated, who remained accountable for the final decision and why that decision can still be considered legitimate.
In that sense, transparency is ultimately not about disclosing technology.
It is about preserving trust in organizational judgment.