Qualified

Meeting the standards, requirements, and training for a position.

Restricted or limited by conditions.

"Assuming that I have all the information, my qualified opinion is that your plan will work."

To describe or characterize something by listing its qualities.

To make someone, or to become competent or eligible for some position or task.

To certify or license someone for something.

To modify, limit, restrict or moderate something; especially to add conditions or requirements for an assertion to be true.