Hi,
to a certain extent it depends on how paranoid You allow yourself to get ;-)
One solution could be to use indirection, e.g. via the Config File Provider Plugin.
Use an arbitrary token in your job description, and in an additional build step access a configuration file to read the actual access token that is necessary ... via simple properties.
That way You could use different IDs for each Jenkins instance, if that is a requirement, and the mapping is done via the configuration file.
Cheers,
Steffen