diff --git a/openapi.yaml b/openapi.yaml
index 0f2b1a95..78a54866 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -8388,7 +8388,6 @@ components:
           description: |
             An array of tool calls the run step was involved in. These can be associated with one of three types of tools: `code_interpreter`, `retrieval`, or `function`.
           items:
-            type: object
             oneOf:
               - $ref: "#/components/schemas/RunStepDetailsToolCallsCodeObject"
               - $ref: "#/components/schemas/RunStepDetailsToolCallsRetrievalObject"