diff --git a/agent/tools/read/read.py b/agent/tools/read/read.py
index 09cd1f9c..69f5676c 100644
--- a/agent/tools/read/read.py
+++ b/agent/tools/read/read.py
@@ -16,7 +16,7 @@ class Read(BaseTool):
     """Tool for reading file contents"""
     
     name: str = "read"
-    description: str = f"Read or inspect file contents. For text/PDF files, returns content (truncated to {DEFAULT_MAX_LINES} lines or {DEFAULT_MAX_BYTES // 1024}KB). For images/videos/audio, returns metadata only (file info, size, type). Use offset/limit for large text files."
+    description: str = f"Read or inspect file contents. For text/PDF/Word/Excel/PPT files, returns content (truncated to {DEFAULT_MAX_LINES} lines or {DEFAULT_MAX_BYTES // 1024}KB). For images/videos/audio, returns metadata only (file info, size, type). Use offset/limit for large text files."
     
     params: dict = {
         "type": "object",
diff --git a/desktop/build/cowagent-backend.spec b/desktop/build/cowagent-backend.spec
index b6886a03..123656e3 100644
--- a/desktop/build/cowagent-backend.spec
+++ b/desktop/build/cowagent-backend.spec
@@ -73,6 +73,21 @@ hiddenimports += [
     'tiktoken_ext.openai_public',
 ]
 
+# Document parsing libs. The read / web_fetch tools import these lazily inside
+# functions (e.g. `from pypdf import PdfReader`), so PyInstaller's static
+# analysis misses them and they'd be dropped from the bundle — leaving the
+# desktop client unable to read PDF/Word/Excel/PPT. List them explicitly.
+hiddenimports += [
+    'pypdf',
+    'docx',           # python-docx
+    'pptx',           # python-pptx
+    'openpyxl',
+]
+hiddenimports += collect_submodules('pypdf')
+hiddenimports += collect_submodules('docx')
+hiddenimports += collect_submodules('pptx')
+hiddenimports += collect_submodules('openpyxl')
+
 # --- Data files -----------------------------------------------------------
 # Runtime-read files/dirs that must travel with the executable. Paths are
 # (source, dest_dir_in_bundle).
@@ -92,6 +107,12 @@ datas = [
 # Some libraries (tiktoken encodings, etc.) ship data files.
 datas += collect_data_files('tiktoken_ext', include_py_files=False)
 
+# python-docx / python-pptx bundle template files (default.docx / default.pptx,
+# content-type XML) inside their packages; they're loaded at import/parse time,
+# so ship them or document parsing fails in the frozen build.
+datas += collect_data_files('docx')
+datas += collect_data_files('pptx')
+
 # --- Excludes -------------------------------------------------------------
 # Keep the bundle lean: drop Feishu's heavy SDK, plugins (disabled in desktop
 # mode), tests/docs, and dev-only packages.