create_row · Google Sheets MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_row does on Google Sheets MCP Server

AI agents use create_row 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 create_row needs a policy

The tool creates new data in a Google Sheet via row insertion. This is a Write operation because it modifies data reversibly (rows can be deleted or updated). Severity is high because an AI agent with careless instructions could add large volumes of unintended data to a shared or production sheet, and Google Sheets may have row limits or quota implications.

From the tool's definition Tool name is 'create_row' and description states 'Create a new row in a sheet' — this is a reversible data creation operation that modifies sheet contents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_row Rate-limited

create_row 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": {
    "create_row": {
      "limits": [
        {
          "counter": "create_row_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 create_row

What does the create_row tool do? +

Create a new row in a sheet. Pass data as a JSON object with column names as keys. 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 create_row? +

Register the Google Sheets MCP Server MCP server in PolicyLayer and add a rule for create_row: 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 create_row? +

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

Can I rate-limit create_row? +

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

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

create_row is provided by the Google Sheets MCP Server MCP server (matty-v/google-sheets-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.