unmerge_excel_cells · Office MCP Server MCP: Risk & Policy

WHAT IT DOES

What unmerge_excel_cells does on Office MCP Server

AI agents use unmerge_excel_cells to create or update resources in Office MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Office MCP Server environment.

WHY IT NEEDS A POLICY

Why unmerge_excel_cells needs a policy

This tool modifies an Excel spreadsheet by unmerging previously merged cells—a data transformation operation that changes the structure/formatting of the document. It is reversible (cells can be re-merged), creates no lasting irreversible damage, does not execute arbitrary code or delete data, and does not involve financial operations. Therefore it fits the Write category.

From the tool's definition Tool name 'unmerge_excel_cells' and description '取消合并 Excel 单元格' (unmerge Excel cells) indicate reversible modification of spreadsheet cell formatting structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unmerge_excel_cells Rate-limited

unmerge_excel_cells stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "unmerge_excel_cells": {
      "limits": [
        {
          "counter": "unmerge_excel_cells_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Office MCP Server, so you can run agents against it safely.

FAQ

Questions about unmerge_excel_cells

What does the unmerge_excel_cells tool do? +

取消合并 Excel 单元格. It is categorised as a Write tool in the Office MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unmerge_excel_cells? +

Register the Office MCP Server MCP server in PolicyLayer and add a rule for unmerge_excel_cells: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Office MCP Server. Nothing to install.

What risk level is unmerge_excel_cells? +

unmerge_excel_cells is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit unmerge_excel_cells? +

Yes. Add a rate_limit block to the unmerge_excel_cells rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block unmerge_excel_cells completely? +

Set action: deny in the PolicyLayer policy for unmerge_excel_cells. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides unmerge_excel_cells? +

unmerge_excel_cells is provided by the Office MCP Server MCP server (walkingzzzy/office-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.