Revert "Add batch editing capabilities to Edit Tool (#648)" (#857)

1 files changed, 19 insertions, 11 deletions

diff --git a/docs/tools/file-system.md b/docs/tools/file-system.md
index 585db0f8..655611a3 100644
--- a/docs/tools/file-system.md
+++ b/docs/tools/file-system.md
@@ -53,7 +53,6 @@ All file system tools operate within a `rootDirectory` (usually the current work
 - **Behavior:**
   - Writes the provided `content` to the `file_path`.
   - Creates parent directories if they don't exist.
-  - **Self-correction:** Before writing, the tool may use the Gemini model to correct the provided content to ensure it is valid and well-formed.
 - **Output (`llmContent`):** A success message, e.g., `Successfully overwrote file: /path/to/your/file.txt` or `Successfully created and wrote to new file: /path/to/new/file.txt`.
 - **Confirmation:** Yes. Shows a diff of changes and asks for user approval before writing.
 
@@ -102,24 +101,33 @@ All file system tools operate within a `rootDirectory` (usually the current work
   ```
 - **Confirmation:** No.
 
-## 6. `edit_file` (EditFile)
+## 6. `replace` (Edit)
 
-- **Tool Name:** `edit_file`
-- **Display Name:** EditFile
+- **Tool Name:** `replace`
+- **Display Name:** Edit
 - **File:** `edit.ts`
-- **Description:** Replaces text within a file. By default, replaces a single occurrence, but can replace multiple occurrences when `expected_replacements` is specified. This tool is designed for precise, targeted changes and requires significant context around the `old_string` to ensure it modifies the correct location. It can also be used to create new files if `old_string` is empty and the `file_path` does not exist.
+- **Description:** Replaces text within a file. By default, replaces a single occurrence, but can replace multiple occurrences when `expected_replacements` is specified. This tool is designed for precise, targeted changes and requires significant context around the `old_string` to ensure it modifies the correct location.
 - **Parameters:**
   - `file_path` (string, required): The absolute path to the file to modify.
   - `old_string` (string, required): The exact literal text to replace. **CRITICAL:** This string must uniquely identify the single instance to change. It should include at least 3 lines of context _before_ and _after_ the target text, matching whitespace and indentation precisely. If `old_string` is empty, the tool attempts to create a new file at `file_path` with `new_string` as content.
   - `new_string` (string, required): The exact literal text to replace `old_string` with.
   - `expected_replacements` (number, optional): The number of occurrences to replace. Defaults to 1.
 - **Behavior:**
-  - **Modifying existing files**: Replaces exact text matches. File must exist unless the first edit has an empty `old_string` (indicating file creation).
-  - **Creating new files**: Use an empty `old_string` in the first edit to create a new file with `new_string` as the content.
-  - **Batch editing**: Applies multiple changes in sequence to the same file.
-  - **Enhanced Reliability**: Incorporates multi-stage edit correction to improve success rates when initial text matches aren't perfect.
-  - **Context Requirements**: Each `old_string` must uniquely identify the target location with sufficient context (typically 3+ lines before and after).
-- **Output (`llmContent`):** Reports number of edits applied, attempted, and any failures with specific error details for troubleshooting.
+  - If `old_string` is empty and `file_path` does not exist, creates a new file with `new_string` as content.
+  - If `old_string` is provided, it reads the `file_path` and attempts to find exactly one occurrence of `old_string`.
+  - If one occurrence is found, it replaces it with `new_string`.
+  - **Enhanced Reliability (Multi-Stage Edit Correction):** To significantly improve the success rate of edits, especially when the model-provided `old_string` might not be perfectly precise, the tool incorporates a multi-stage edit correction mechanism.
+    - If the initial `old_string` isn't found or matches multiple locations, the tool can leverage the Gemini model to iteratively refine `old_string` (and potentially `new_string`).
+    - This self-correction process attempts to identify the unique segment the model intended to modify, making the `replace` operation more robust even with slightly imperfect initial context from the AI.
+  - **Failure Conditions:** Despite the correction mechanism, the tool will fail if:
+    - `file_path` is not absolute or is outside the root directory.
+    - `old_string` is not empty, but the `file_path` does not exist.
+    - `old_string` is empty, but the `file_path` already exists.
+    - `old_string` is not found in the file after attempts to correct it.
+    - `old_string` is found multiple times, and the self-correction mechanism cannot resolve it to a single, unambiguous match.
+- **Output (`llmContent`):**
+  - On success: `Successfully modified file: /path/to/file.txt (1 replacements).` or `Created new file: /path/to/new_file.txt with provided content.`
+  - On failure: An error message explaining the reason (e.g., `Failed to edit, 0 occurrences found...`, `Failed to edit, expected 1 occurrences but found 2...`).
 - **Confirmation:** Yes. Shows a diff of the proposed changes and asks for user approval before writing to the file.
 
 These file system tools provide a robust foundation for the Gemini CLI to understand and interact with your local project context.