OnCall API clarification

[jasuade]

What this PR does

Which issue(s) this PR closes

Closes [issue link here]

Checklist

• Unit, integration, and e2e (if applicable) tests updated
• Documentation added (or pr:no public docs PR label added if not required)
• Added the relevant release notes label (see labels prefixed w/ release:). These labels dictate how your PR will
  show up in the autogenerated release notes.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
6 out of 8 committers have signed the CLA.

✅ joeyorlando
✅ mderynck
✅ matiasb
✅ brojd
✅ vadimkerr
✅ Ferril
❌ actions-user
❌ jasuade
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[joeyorlando]

thank you @jasuade!