chore:clarify the behavior of disallow_transfer_to_parent

The original description is not clear enough and can create confusion like #3081.

PiperOrigin-RevId: 824564227

Author: wuliang229

src/google/adk/agents/llm_agent.py

@@ -267,8 +267,9 @@ class LlmAgent(BaseAgent):
   disallow_transfer_to_parent: bool = False
   """Disallows LLM-controlled transferring to the parent agent.
 
-  NOTE: Setting this as True also prevents this agent to continue reply to the
-  end-user. This behavior prevents one-way transfer, in which end-user may be
+  NOTE: Setting this as True also prevents this agent from continuing to reply
+  to the end-user, and will transfer control back to the parent agent in the
+  next turn. This behavior prevents one-way transfer, in which end-user may be
   stuck with one agent that cannot transfer to other agents in the agent tree.
   """
   disallow_transfer_to_peers: bool = False

src/google/adk/flows/llm_flows/auto_flow.py

@@ -32,7 +32,7 @@ class AutoFlow(SingleFlow):
   For peer-agent transfers, it's only enabled when all below conditions are met:
 
   - The parent agent is also an LlmAgent.
-  - `disallow_transfer_to_peer` option of this agent is False (default).
+  - `disallow_transfer_to_peers` option of this agent is False (default).
 
   Depending on the target agent type, the transfer may be automatically
   reversed. (see Runner._find_agent_to_run method for which agent will remain