Setup:
We have an Agentforce superagent with two connected subagents wired via connected_subagent blocks in the .agent file. Deployed on Service Cloud Voice (PSTN telephony channel).
Problem:
On every turn where the master agent routes to a connected subagent, the caller hears
"Collaborating with other agents" spoken aloud before the subagent's actual response. This happens on every single turn - not just the first handoff - making the experience very disruptive on a live voice call.What we tried:
- Setting loading_text to a custom string → that custom string gets spoken instead (confirms loading_text is read aloud on voice)
- Setting loading_text: "" (empty string) → platform still speaks "Collaborating with other agents" (empty string does not suppress the default)
- Omitting loading_text entirely → same default audio plays
- Adding outbound_filler_sentences to the modality voice block → no observed change to the connected subagent audio
Current workaround:
Set loading_text: "One moment." - replaces "Collaborating with other agents" with a shorter phrase, but doesn't eliminate the audio entirely.
What we want:
Either silence the audio completely between turns, or understand if there is a supported way to suppress the platform's default connected subagent filler on a voice channel.
Questions for the community:
- Is there a way to fully silence loading_text on a voice channel (e.g., a single space, a special value)?
- Does outbound_filler_sentences in modality voice affect connected subagent transitions, or only action calls?
- Is this a known limitation of the superagent/connected subagent pattern on voice, and is there a workaround?
#Agentforce #SuperAgents #Service Cloud Voice
Hi Sumit, I think what you’re seeing is expected behavior with the current Voice + connected subagent setup.
From your testing, it looks like loading_text is always being spoken on the voice channel. When you leave it empty, Agentforce falls back to the default message “Collaborating with other agents”
instead of staying silent.
outbound_filler_sentences is mainly used while actions are running, so it may not control the connected subagent handoff message.
At the moment, I’m not aware of a supported value like blank space, null, or another setting that completely removes this audio.
So your current workaround:
loading_text: "One moment."
is probably the safest option for now.
I would also raise this with Salesforce Support or post it as an Idea, because on a live PSTN call, hearing the same handoff message on every subagent turn can definitely affect the user experience.
Thank you,
Venkat Yadav.