/usr/share/akonadi/agents/ is in kdepim-runtime 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/akonadi/agents/akonotesresource.desktop
/usr/share/akonadi/agents/birthdaysresource.desktop
/usr/share/akonadi/agents/contactsresource.desktop
/usr/share/akonadi/agents/davgroupwareresource.desktop
/usr/share/akonadi/agents/googlecalendarresource.desktop
/usr/share/akonadi/agents/googlecontactsresource.desktop
/usr/share/akonadi/agents/icaldirresource.desktop
/usr/share/akonadi/agents/icalresource.desktop
/usr/share/akonadi/agents/imapresource.desktop
/usr/share/akonadi/agents/invitationsagent.desktop
/usr/share/akonadi/agents/kalarmdirresource.desktop
/usr/share/akonadi/agents/kalarmresource.desktop
/usr/share/akonadi/agents/kolabresource.desktop
/usr/share/akonadi/agents/maildirresource.desktop
/usr/share/akonadi/agents/maildispatcheragent.desktop
/usr/share/akonadi/agents/mboxresource.desktop
/usr/share/akonadi/agents/migrationagent.desktop
/usr/share/akonadi/agents/mixedmaildirresource.desktop
/usr/share/akonadi/agents/newmailnotifieragent.desktop
/usr/share/akonadi/agents/notesresource.desktop
/usr/share/akonadi/agents/openxchangeresource.desktop
/usr/share/akonadi/agents/pop3resource.desktop
/usr/share/akonadi/agents/vcarddirresource.desktop
/usr/share/akonadi/agents/vcardresource.desktop