This is the fallback path: use search_doctor_registration and check_blacklist
for a real, live answer. Reach for this tool instead when those fail, look
wrong, or you'd rather double-check by hand -- it hands back exactly where
and how to search nmc.org.in yourself rather than an automated result.

Provide at least one of doctor_name or registration_number. This calls the
same public JSON endpoint nmc.org.in's own search page uses -- a real, live
lookup, not a guide. That endpoint is undocumented and unsupported by NMC,
so treat a request failure as "try registration_lookup_guide instead," not
as "the doctor doesn't exist."

Quirk worth knowing: NMC's backend 500s on any name value containing a
space (confirmed against the live endpoint -- a bug in their server, not
a validation rule of ours). A multi-word doctor_name is narrowed to its
most distinctive single word before being sent, and every match comes
back with a name_match flag so you can still tell whether the full name
actually lines up.

A registration number match alone doesn't mean the practitioner is
currently in good standing -- always also call check_blacklist.

Not a general search -- this is the live "View" detail for an
already-found doctor_id + registration_number pair, showing qualification,
college, university, and additional qualifications for a closer match
check. Deliberately excludes personal contact fields the underlying
record also contains (date of birth, phone, email, home address) --
those aren't needed to verify a registration is genuine, and returning
them would turn a verification lookup into a PII source.

A doctor can have a completely genuine registration and still be
currently suspended -- search_doctor_registration alone won't show that,
this does. Provide a filter, or nothing to get the full current list
(nationally, this is normally only a few dozen entries).