fix: Default to tool_call when interaction_type is not set

Author: g3force

adk/agenticlayer/config.py

@@ -45,7 +45,7 @@ def parse_sub_agents(sub_agents_config: str) -> list[SubAgent]:
         SubAgent(
             name=agent_name,
             url=config["url"],
-            interaction_type=InteractionType(config.get("interaction_type")),
+            interaction_type=InteractionType(config.get("interaction_type", "tool_call")),
         )
         for agent_name, config in agents_map.items()
     ]

adk/tests/test_config.py

@@ -16,14 +16,17 @@ def test_parse_sub_agents_with_different_interaction_types(self) -> None:
             "sub_agent_2": {
                 "url": "http://sub-agent-2.local/.well-known/agent-card.json",
                 "interaction_type": "tool_call"
+            },
+            "sub_agent_3": {
+                "url": "http://sub-agent-3.local/.well-known/agent-card.json"
             }
         }"""
 
         # When: Parsing the config
         sub_agents = parse_sub_agents(config)
 
         # Then: Both sub-agents are parsed correctly
-        assert len(sub_agents) == 2
+        assert len(sub_agents) == 3
 
         transfer_agent = next(a for a in sub_agents if a.name == "sub_agent_1")
         assert str(transfer_agent.url) == "http://sub-agent-1.local/.well-known/agent-card.json"
@@ -33,6 +36,10 @@ def test_parse_sub_agents_with_different_interaction_types(self) -> None:
         assert str(tool_call_agent.url) == "http://sub-agent-2.local/.well-known/agent-card.json"
         assert tool_call_agent.interaction_type == InteractionType.TOOL_CALL
 
+        tool_call_agent = next(a for a in sub_agents if a.name == "sub_agent_3")
+        assert str(tool_call_agent.url) == "http://sub-agent-3.local/.well-known/agent-card.json"
+        assert tool_call_agent.interaction_type == InteractionType.TOOL_CALL
+
     def test_parse_sub_agents_empty_config(self) -> None:
         """Test parsing empty sub-agents config."""
         assert parse_sub_agents("{}") == []