exclude unset to drop default None values

davemssavage · davemssavage · commit 7131de6b44b4 · 2025-05-11T17:52:03.000Z
diff --git a/src/mcp/shared/session.py b/src/mcp/shared/session.py
@@ -314,7 +314,7 @@ async def _send_response(
                 jsonrpc="2.0",
                 id=request_id,
                 result=response.model_dump(
-                    by_alias=True, mode="json", exclude_none=True
+                    by_alias=True, mode="json", exclude_none=True, exclude_unset=True
                 ),
             )
             session_message = SessionMessage(message=JSONRPCMessage(jsonrpc_response))

Original file line number	Diff line number	Diff line change
`@@ -314,7 +314,7 @@ async def _send_response(`
`314`	`314`	`jsonrpc="2.0",`
`315`	`315`	`id=request_id,`
`316`	`316`	`result=response.model_dump(`
`317`		`- by_alias=True, mode="json", exclude_none=True`
	`317`	`+ by_alias=True, mode="json", exclude_none=True, exclude_unset=True`
`318`	`318`	`),`
`319`	`319`	`)`
`320`	`320`	`session_message = SessionMessage(message=JSONRPCMessage(jsonrpc_response))`