diff --git a/litellm/litellm_core_utils/get_supported_openai_params.py b/litellm/litellm_core_utils/get_supported_openai_params.py
index 77d3b255fd7..d8ece43282b 100644
--- a/litellm/litellm_core_utils/get_supported_openai_params.py
+++ b/litellm/litellm_core_utils/get_supported_openai_params.py
@@ -40,6 +40,9 @@ def get_supported_openai_params(
         except BadRequestError:
             return None
 
+    if custom_llm_provider == "scaleway" and request_type == "chat_completion":
+        return litellm.OpenAIConfig().get_supported_openai_params(model=model)
+
     if custom_llm_provider in LlmProvidersSet:
         provider_config = litellm.ProviderConfigManager.get_provider_chat_config(
             model=model,
diff --git a/tests/unit/litellm_core_utils/test_get_supported_openai_params.py b/tests/unit/litellm_core_utils/test_get_supported_openai_params.py
index f9e285cf9fb..9ed748535c3 100644
--- a/tests/unit/litellm_core_utils/test_get_supported_openai_params.py
+++ b/tests/unit/litellm_core_utils/test_get_supported_openai_params.py
@@ -125,6 +125,17 @@ def test_sambanova_embeddings_request_returns_list_not_none():
     assert embedding_params == []
 
 
+def test_json_configured_provider_advertises_openai_chat_params():
+    params = get_supported_openai_params(
+        model="qwen3.5-397b-a17b",
+        custom_llm_provider="scaleway",
+    )
+
+    assert params is not None
+    assert "tools" in params
+    assert "tool_choice" in params
+
+
 def test_bedrock_converse_alias_resolves_like_bedrock():
     """The ``bedrock_converse`` invocation alias must resolve through AmazonConverseConfig
     just like ``bedrock`` (the codebase already pairs them, e.g. ``_strip_model_name``).