on most other params that accept a semi-colon delimited list we see
list of tags questions must have, semicolon delimited A single primary key identifier or a vectorized, semicolon-delimited list of identifiers.
on /search we see
List of tags delimited by semi-colons that must not be on a question List of tags delimited by semi-colons of which at least one must be on a question
It would help machine readers if the search params were described with the terms
delimited adjacent anywhere in the description.
List of tags that must not be on a question, semicolon delimited List of tags of which at least one must be on a question, semicolon delimited
found another one on
tagged (optional) List of tags questions must have string