My Finance MCP Server

Instructions

Implementation Reference

• my_finance_mcp.py:170-227 (handler)

  The handler function for the 'delete_transactions' tool, which deletes transactions from the JSON ledger and ChromaDB based on indices or all if specified. Includes safety confirm parameter. The @mcp.tool() decorator registers it.
  @mcp.tool() def delete_transactions(indices: Optional[List[int]] = None, delete_all: bool = False, confirm: bool = False) -> str: """ Delete transactions from both the JSON ledger and ChromaDB. Args: indices: List of transaction indices (from list_transactions) to delete delete_all: Set to true to delete all transactions confirm: Must be true to actually perform deletion (safety guard) Returns: Status message describing the deletion result """ if not confirm: raise ValueError("Deletion aborted: set confirm=True to proceed.") transactions = _load_transactions() if delete_all: deleted_count = len(transactions) _save_transactions([]) try: # Recreate the collection to ensure it is empty global collection chroma_client.delete_collection("transactions") collection = chroma_client.get_or_create_collection("transactions") except chromadb.errors.InvalidCollectionException: pass return f"Deleted {deleted_count} transactions." if deleted_count else "No transactions to delete." if not indices: raise ValueError("Provide indices to delete or set delete_all=True.") indices_set = set(indices) remaining: List[Dict[str, Any]] = [] removed: List[Dict[str, Any]] = [] for idx, txn in enumerate(transactions): if idx in indices_set: removed.append(txn) else: remaining.append(txn) if not removed: return "No transactions matched the provided indices." _save_transactions(remaining) # Remove matching entries from ChromaDB using metadata filters for txn in removed: metadata_filter = {k: v for k, v in txn.items() if isinstance(k, str)} try: collection.delete(where=metadata_filter) except Exception: # If metadata-based delete fails, ignore but keep JSON consistent continue return f"Deleted {len(removed)} transactions."
• my_finance_mcp.py:170-170 (registration)

  The @mcp.tool() decorator registers the delete_transactions function as an MCP tool.
  @mcp.tool()