diff --git a/lib/galaxy/schema/tools.py b/lib/galaxy/schema/tools.py
index 1cea9f5f0456..77db23244568 100644
--- a/lib/galaxy/schema/tools.py
+++ b/lib/galaxy/schema/tools.py
@@ -11,6 +11,7 @@
     ConfigDict,
     Field,
     field_validator,
+    UUID4,
 )
 
 from galaxy.schema.fields import DecodedDatabaseIdField
@@ -25,12 +26,12 @@
 
 
 class ExecuteToolPayload(Model):
-    tool_id: Optional[Any] = Field(
+    tool_id: Optional[str] = Field(
         default=None,
         title="Tool ID",
         description="The ID of the tool to execute.",
     )
-    tool_uuid: Optional[Any] = Field(
+    tool_uuid: Optional[UUID4] = Field(
         default=None,
         title="Tool UUID",
         description="The UUID of the tool to execute.",