feat(arcade-core): add CONTACTS service domain (TOO-1322)

libs/arcade-core/arcade_core/metadata.py

@@ -40,6 +40,9 @@ class ServiceDomain(str, Enum):
     CRM = "crm"
     """Customer relationship management - contacts, deals, pipelines, sales activities."""
 
+    CONTACTS = "contacts"
+    """Address books and people directories — managing personal or organizational contact records."""
+
     EMAIL = "email"
     """Email services for sending, receiving, and managing messages."""
 

libs/tests/tool/test_tool_metadata.py

@@ -347,6 +347,24 @@ def search_people() -> str:
             ServiceDomain.SALES_INTELLIGENCE
         ]
 
+    def test_decorator_accepts_contacts_domain(self):
+        """CONTACTS classifies address-book / people-directory services (e.g. Google Contacts)."""
+        assert ServiceDomain.CONTACTS.value == "contacts"
+
+        @tool(
+            desc="Search the organization directory",
+            metadata=ToolMetadata(
+                classification=Classification(service_domains=[ServiceDomain.CONTACTS]),
+                behavior=Behavior(operations=[Operation.READ], read_only=True, open_world=True),
+            ),
+        )
+        def search_directory() -> str:
+            return "results"
+
+        assert search_directory.__tool_metadata__.classification.service_domains == [
+            ServiceDomain.CONTACTS
+        ]
+
     def test_decorator_without_metadata_is_backward_compatible(self):
         """Decorator should work without metadata (existing tools unchanged)."""