This is before an indictment is even filed. Jury nullification takes place at the trial deliberation stage, after arguments have been presented from both sides with a judge presiding. This is no where even there yet.
Because words mean things, and precision matters.
An actual jury nullification cannot be appealed, and the accused gets to go scot-free forever in that jurisdiction, even to prosecutor's chagrin. In this case, the prosecutor could gather another grand jury and try again, at any time, without restriction, if they so choose.
But yes, a clear and accurate description, thank you.
That is a wholly different definition than jury nullification, where one or more members of the jury return a "not guilty" verdict because they reject the law or its application irrespective of the defendant's guilt.
The standard of proof differs. A GJ is not required to find a defendant guilty; instead, they must determine whether there is sufficient evidence to suggest the possibility of a crime. The subsequent proceedings will then determine the outcome.