google_sheets_append_rows · Google Sheets MCP Server MCP

WHAT IT DOES

What google_sheets_append_rows does on Google Sheets MCP Server

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

WHY IT NEEDS A POLICY

Why google_sheets_append_rows needs a policy

The tool creates new rows in a Google Sheet, which is a reversible write operation. It does not delete or overwrite existing data, it only appends. The server description claims read-only access, but this tool clearly performs a write operation, suggesting a discrepancy; however, the tool itself is classified by what it does.

From the tool's definition Append rows to the end of data in a Google Spreadsheet tab. This tool adds new rows after the last row of existing data in the specified tab.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

google_sheets_append_rows Rate-limited

google_sheets_append_rows 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": {
    "google_sheets_append_rows": {
      "limits": [
        {
          "counter": "google_sheets_append_rows_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 Google Sheets MCP Server, so you can run agents against it safely.

FAQ

Questions about google_sheets_append_rows

What does the google_sheets_append_rows tool do? +

Append rows to the end of data in a Google Spreadsheet tab. This tool adds new rows after the last row of existing data in the specified tab. Args: - url (string): Full Google Sheets URL - tab_name (string): Name of the tab/sheet - values (array): 2D array of rows to append Example: - values: [[. It is categorised as a Write tool in the Google Sheets 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 google_sheets_append_rows? +

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

What risk level is google_sheets_append_rows? +

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

Can I rate-limit google_sheets_append_rows? +

Yes. Add a rate_limit block to the google_sheets_append_rows 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 google_sheets_append_rows completely? +

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

google_sheets_append_rows is provided by the Google Sheets MCP Server MCP server (saturnino-adrales/gdocs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.