... them consistent between entries.
Files are checked for validity on loading, metrics can be displayed.
Peak information is stored as {mass, intensity, tag} where tag is the seldom used optional peak specific comment.
For batch operations, such as rounding all the masses to integers, a scheme of programatic plugins is available. (If you're not a techy dotNet programmer this bit is probably best avoided. Just put in a ticket for new feature request).
Happy MSP Librarianing!