diff --git a/temporalio/contrib/openai_agents/workflow.py b/temporalio/contrib/openai_agents/workflow.py
index 63ec43154..51eff86a3 100644
--- a/temporalio/contrib/openai_agents/workflow.py
+++ b/temporalio/contrib/openai_agents/workflow.py
@@ -46,6 +46,7 @@ def activity_as_tool(
     versioning_intent: Optional[VersioningIntent] = None,
     summary: Optional[str] = None,
     priority: Priority = Priority.default,
+    strict_json_schema: bool = True,
 ) -> Tool:
     """Convert a single Temporal activity function to an OpenAI agent tool.
 
@@ -61,6 +62,8 @@ def activity_as_tool(
 
     Args:
         fn: A Temporal activity function to convert to a tool.
+        strict_json_schema: Whether the tool should follow a strict schema.
+            See https://openai.github.io/openai-agents-python/ref/tool/#agents.tool.FunctionTool.strict_json_schema
         For other arguments, refer to :py:mod:`workflow` :py:meth:`start_activity`
 
     Returns:
@@ -151,7 +154,7 @@ async def run_activity(ctx: RunContextWrapper[Any], input: str) -> Any:
         description=schema.description or "",
         params_json_schema=schema.params_json_schema,
         on_invoke_tool=run_activity,
-        strict_json_schema=True,
+        strict_json_schema=strict_json_schema,
     )
 
 
@@ -161,6 +164,7 @@ def nexus_operation_as_tool(
     service: Type[Any],
     endpoint: str,
     schedule_to_close_timeout: Optional[timedelta] = None,
+    strict_json_schema: bool = True,
 ) -> Tool:
     """Convert a Nexus operation into an OpenAI agent tool.
 
@@ -177,6 +181,7 @@ def nexus_operation_as_tool(
         fn: A Nexus operation to convert into a tool.
         service: The Nexus service class that contains the operation.
         endpoint: The Nexus endpoint to use for the operation.
+        strict_json_schema: Whether the tool should follow a strict schema
 
     Returns:
         An OpenAI agent tool that wraps the provided operation.
@@ -237,7 +242,7 @@ async def run_operation(ctx: RunContextWrapper[Any], input: str) -> Any:
         description=schema.description or "",
         params_json_schema=schema.params_json_schema,
         on_invoke_tool=run_operation,
-        strict_json_schema=True,
+        strict_json_schema=strict_json_schema,
     )