Update doc for min_endpointing_delay (#4327)

Author: MonkeyLeeT

livekit-agents/livekit/agents/voice/agent.py

@@ -594,8 +594,11 @@ def allow_interruptions(self) -> NotGivenOr[bool]:
     @property
     def min_endpointing_delay(self) -> NotGivenOr[float]:
         """
-        Minimum time-in-seconds the agent must wait after a potential end-of-utterance signal
-        before it declares the user’s turn complete.
+        Minimum time-in-seconds since the last detected speech before the agent
+        declares the user’s turn complete. In VAD mode this effectively behaves
+        like max(VAD silence, min_endpointing_delay); in STT mode it is applied
+        after the STT end-of-speech signal, so it can be additive with the STT
+        provider’s endpointing delay.
 
         If this property was set at Agent creation, it will be used at runtime instead of the session's value.
         """

livekit-agents/livekit/agents/voice/agent_session.py

@@ -207,10 +207,13 @@ def __init__(
                 register as an interruption. Default ``0.5`` s.
             min_interruption_words (int): Minimum number of words to consider
                 an interruption, only used if stt enabled. Default ``0``.
-            min_endpointing_delay (float): Minimum time-in-seconds the agent
-                must wait after a potential end-of-utterance signal (from VAD
-                or an EOU model) before it declares the user’s turn complete.
-                Default ``0.5`` s.
+            min_endpointing_delay (float): Minimum time-in-seconds since the
+                last detected speech before the agent declares the user’s turn
+                complete. In VAD mode this effectively behaves like
+                max(VAD silence, min_endpointing_delay); in STT mode it is
+                applied after the STT end-of-speech signal, so it can be
+                additive with the STT provider’s endpointing delay. Default
+                ``0.5`` s.
             max_endpointing_delay (float): Maximum time-in-seconds the agent
                 will wait before terminating the turn. Default ``3.0`` s.
             max_tool_steps (int): Maximum consecutive tool calls per LLM turn.