sheets_update_values · MCP Google Workspace Server MCP

WHAT IT DOES

What sheets_update_values does on MCP Google Workspace Server

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

WHY IT NEEDS A POLICY

Why sheets_update_values needs a policy

The tool creates or modifies data reversibly within a spreadsheet. While it alters data, it is not destructive (data can be recovered via version history in Google Sheets) and does not delete or permanently remove information.

From the tool's definition Tool name is 'sheets_update_values' and description states 'Update values in a Google Sheet range' — this directly modifies existing data in Google Sheets.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sheets_update_values Rate-limited

sheets_update_values 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_update_values": {
      "limits": [
        {
          "counter": "sheets_update_values_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 MCP Google Workspace Server, so you can run agents against it safely.

FAQ

Questions about sheets_update_values

What does the sheets_update_values tool do? +

Update values in a Google Sheet range. It is categorised as a Write tool in the MCP Google Workspace 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_update_values? +

Register the MCP Google Workspace Server MCP server in PolicyLayer and add a rule for sheets_update_values: 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 Workspace Server. Nothing to install.

What risk level is sheets_update_values? +

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

Can I rate-limit sheets_update_values? +

Yes. Add a rate_limit block to the sheets_update_values 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_update_values completely? +

Set action: deny in the PolicyLayer policy for sheets_update_values. 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_update_values? +

sheets_update_values is provided by the MCP Google Workspace Server MCP server (josedu90/mcp-suiteg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.