BrowseFilesTool

Lists the immediate contents of a directory, sandboxed to external storage via PathValidator (defaults to /sdcard). Directories sort first, then by name. Requires READ_EXTERNAL_STORAGE on API ≤32; uses File API access on API 33+. Output: path, entries (each {name, path, size_bytes, last_modified, is_directory}, size_bytes is null for directories) capped at the limit param, and count.