add_rows · Google Sheets MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_rows does on Google Sheets MCP Server

AI agents use add_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 add_rows needs a policy

add_rows creates new data entries in a spreadsheet in a reversible manner. It does not execute arbitrary code, delete data, move money, or retrieve data without side effects. While it modifies state, the operation can be undone (rows can be deleted), placing it firmly in the Write category rather than Execute or Destructive.

From the tool's definition Tool description states 'Appends rows to the end of a sheet', which is a create/add operation that modifies data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_rows Rate-limited

add_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": {
    "add_rows": {
      "limits": [
        {
          "counter": "add_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 add_rows

What does the add_rows tool do? +

Appends rows to the end of a sheet (after the last row with data). Data should be JSON 2D array. 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 add_rows? +

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

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

Can I rate-limit add_rows? +

Yes. Add a rate_limit block to the add_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 add_rows completely? +

Set action: deny in the PolicyLayer policy for add_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 add_rows? +

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