confirm preferred_tool_id is an id
confirm preferred_tool_id is an id

closes INTEROP-7519
flag=none

test plan:
* see INTEROP-7519 and linked ticket for details

Change-Id: Iaaaa3d43689341d7b058d8fd8c7678ec3ca222e8
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/294410
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Paul Gray <3149ce154c2973056dc41a7285470812d38f164a@instructure.com>
Reviewed-by: Ryan Hawkins <867bc579926fa7e8ba296eacccde2d03d9fb556c@instructure.com>
QA-Review: Paul Gray <3149ce154c2973056dc41a7285470812d38f164a@instructure.com>
Product-Review: Xander Moffatt <27f70fe194da423604e6e0a63a3de19814736fa9@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms