From db05e56b181bcaced503d84d0f263e71b07fa324 Mon Sep 17 00:00:00 2001
From: pakrym-oai <pakrym@openai.com>
Date: Thu, 16 Jul 2026 11:30:26 -0700
Subject: [PATCH] intentionally disable nested tools for code mode eval

---
 codex-rs/core/src/tools/code_mode/execute_handler.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/codex-rs/core/src/tools/code_mode/execute_handler.rs b/codex-rs/core/src/tools/code_mode/execute_handler.rs
index 8374ae1ca4..209e3c401d 100644
--- a/codex-rs/core/src/tools/code_mode/execute_handler.rs
+++ b/codex-rs/core/src/tools/code_mode/execute_handler.rs
@@ -36,8 +36,10 @@ impl CodeModeExecuteHandler {
         let args =
             codex_code_mode::parse_exec_source(&code).map_err(FunctionCallError::RespondToModel)?;
         let exec = ExecContext { session, turn };
-        let enabled_tools =
+        let mut enabled_tools =
             codex_tools::collect_code_mode_tool_definitions(&self.nested_tool_specs);
+        // Intentional eval treatment: make Code Mode unable to invoke any nested tools.
+        enabled_tools.clear();
         let started_at = std::time::Instant::now();
         let started_cell = exec
             .session