Revert "Enable WriteTodos tool by default (#12500)" (#12658)

docs/get-started/configuration.md

@@ -481,7 +481,7 @@ their corresponding top-level category object in your `settings.json` file.
 
 - **`useWriteTodos`** (boolean):
   - **Description:** Enable the write_todos_list tool.
-  - **Default:** `true`
+  - **Default:** `false`
 
 #### `security`
 

docs/tools/todos.md

@@ -6,8 +6,7 @@ This document describes the `write_todos` tool for the Gemini CLI.
 
 The `write_todos` tool allows the Gemini agent to create and manage a list of
 subtasks for complex user requests. This provides you, the user, with greater
-visibility into the agent's plan and its current progress. It also helps with
-alignment where the agent is less likely to lose track of its current goal.
+visibility into the agent's plan and its current progress.
 
 ### Arguments
 
@@ -50,8 +49,8 @@ write_todos({
 
 ## Important notes
 
-- **Enabling:** This tool is enabled by default. You can disable it in your
-  `settings.json` file by setting `"useWriteTodos": false`.
+- **Enabling:** This tool is disabled by default. To use it, you must enable it
+  in your `settings.json` file by setting `"useWriteTodos": true`.
 
 - **Intended Use:** This tool is primarily used by the agent for complex,
   multi-turn tasks. It is generally not used for simple, single-turn questions.