Updates the external tools API documentation
Updates the external tools API documentation

Fixes PLAT-1389

Updated the example response and tool creation arguments

Change-Id: I784a2fd1924ad3c6bec312d0c32e89bd20c65d18
Reviewed-on: https://gerrit.instructure.com/92118
Reviewed-by: Andrew Butterfield <c9c7a32d9a1e9779cfad12bed963960e7af36eac@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: Karl Lloyd <4c8060af93345c2cc416ee6aa55bceec4e5cc9d4@instructure.com>
Tested-by: Jenkins

djbender/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,SwinburneOnline/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,HotChalk/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,SwinburneOnline/canvas-lms,matematikk-mooc/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms,matematikk-mooc/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms