sheets_unmerge_cells · MCP Google Sheets Server MCP

WHAT IT DOES

What sheets_unmerge_cells does on MCP Google Sheets Server

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

WHY IT NEEDS A POLICY

Why sheets_unmerge_cells needs a policy

Unmerging cells is a reversible formatting operation that modifies data presentation without creating or deleting content. It falls under Write (modifies data/formatting) rather than Destructive (no data loss occurs). The blast radius is low since it only affects cell layout and can be easily undone. The confidence is high given the clear operation scope.

From the tool's definition Tool name: 'sheets_unmerge_cells'; description: 'Unmerge cells in a Google Sheet' — the operation modifies cell formatting/structure within a sheet.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sheets_unmerge_cells Rate-limited

sheets_unmerge_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": {
    "sheets_unmerge_cells": {
      "limits": [
        {
          "counter": "sheets_unmerge_cells_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about sheets_unmerge_cells

What does the sheets_unmerge_cells tool do? +

Unmerge cells in a Google Sheet. It is categorised as a Write tool in the MCP Google Sheets 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 sheets_unmerge_cells? +

Register the MCP Google Sheets Server MCP server in PolicyLayer and add a rule for sheets_unmerge_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 MCP Google Sheets Server. Nothing to install.

What risk level is sheets_unmerge_cells? +

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

Can I rate-limit sheets_unmerge_cells? +

Yes. Add a rate_limit block to the sheets_unmerge_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 sheets_unmerge_cells completely? +

Set action: deny in the PolicyLayer policy for sheets_unmerge_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 sheets_unmerge_cells? +

sheets_unmerge_cells is provided by the MCP Google Sheets Server MCP server (oregpt/agenticledger_mcp_sheetsonly). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.