Refactor

tools/read_metadata.py

@@ -1,7 +1,8 @@
-import os
 import logging
+from pathlib import Path
 from typing import Any, Dict
 from PIL import Image
+from tools.utils import ToolError
 
 logger = logging.getLogger("MattCP")
 
@@ -10,15 +11,17 @@ async def handle(args: Dict[str, Any]):
     Extracts text-based metadata chunks (tEXt, zTXt, iTXt) from a PNG file.
     These often contain AI generation prompts and parameters.
     """
-    path = args.get("path")
-    if not path:
-        return {"text": "Error: Missing path argument"}
+    path_str = args.get("path")
+    if not path_str:
+        raise ToolError("Missing path argument")
+    
+    path = Path(path_str)
     
     try:
         with Image.open(path) as img:
             # Metadata extraction is specific to PNG format in this implementation
             if img.format != 'PNG':
-                return {"text": "Error: File is not a PNG image."}
+                raise ToolError("File is not a PNG image.")
             
             # Pillow parses PNG text chunks into the .info dictionary
             metadata = img.info
@@ -28,5 +31,7 @@ async def handle(args: Dict[str, Any]):
             # Format as a simple key: value list
             output = "\n".join([f"{k}: {v}" for k, v in metadata.items()])
             return {"text": f"PNG Metadata:\n{output}"}
+    except ToolError:
+        raise
     except Exception as e:
-        return {"text": f"Error reading PNG metadata: {str(e)}"}
+        raise ToolError(f"Error reading PNG metadata: {str(e)}")