fix: clarify list_allowed_directories description to mention subdirectory access (#2571)

The tool description was ambiguous about subdirectory access within allowed directories.
Updated the description to explicitly state that subdirectories are also accessible.

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>
Co-authored-by: Ola Hungerford <olaservo@users.noreply.github.com>

Author: olaservo

src/filesystem/index.ts

@@ -615,8 +615,10 @@ server.setRequestHandler(ListToolsRequestSchema, async () => {
       {
         name: "list_allowed_directories",
         description:
-          "Returns the list of root directories that this server is allowed to access. " +
-          "Use this to understand which directories are available before trying to access files. ",
+          "Returns the list of directories that this server is allowed to access. " +
+          "Subdirectories within these allowed directories are also accessible. " +
+          "Use this to understand which directories and their nested paths are available " +
+          "before trying to access files.",
         inputSchema: {
           type: "object",
           properties: {},