fix(filesystem): mark move_file as destructive operation

move_file deletes the source file, which is a destructive operation.
Updated annotations and README documentation to reflect this.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/filesystem/README.md

@@ -200,7 +200,7 @@ The mapping for filesystem tools is:
 | `create_directory`          | `false`      | `true`         | `false`         | Re‑creating the same dir is a no‑op             |
 | `write_file`                | `false`      | `true`         | `true`          | Overwrites existing files                       |
 | `edit_file`                 | `false`      | `false`        | `true`          | Re‑applying edits can fail or double‑apply      |
-| `move_file`                 | `false`      | `false`        | `false`         | Move/rename only; repeat usually errors         |
+| `move_file`                 | `false`      | `false`        | `true`          | Deletes source file                             |
 
 > Note: `idempotentHint` and `destructiveHint` are meaningful only when `readOnlyHint` is `false`, as defined by the MCP spec.
 

src/filesystem/index.ts

@@ -589,7 +589,7 @@ server.registerTool(
       destination: z.string()
     },
     outputSchema: { content: z.string() },
-    annotations: { readOnlyHint: false, idempotentHint: false, destructiveHint: false }
+    annotations: { readOnlyHint: false, idempotentHint: false, destructiveHint: true }
   },
   async (args: z.infer<typeof MoveFileArgsSchema>) => {
     const validSourcePath = await validatePath(args.source);