sheets_insert_sheet · Mcp Gsheets MCP: Risk & Policy

WHAT IT DOES

What sheets_insert_sheet does on Mcp Gsheets

AI agents use sheets_insert_sheet to create or update resources in Mcp Gsheets — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Gsheets environment.

WHY IT NEEDS A POLICY

Why sheets_insert_sheet needs a policy

This tool creates a new sheet within a spreadsheet, which is a reversible Write operation. It modifies the spreadsheet structure by adding a new sheet but does not delete data or execute arbitrary code. The severity is medium because inserting unwanted sheets could clutter a spreadsheet or cause confusion, but the operation is easily reversible (sheets can be deleted).

From the tool's definition Tool name 'sheets_insert_sheet' combined with description 'Add a new sheet to an existing Google Sheets spreadsheet' clearly indicates a sheet creation operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sheets_insert_sheet Rate-limited

sheets_insert_sheet 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_insert_sheet": {
      "limits": [
        {
          "counter": "sheets_insert_sheet_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 Gsheets, so you can run agents against it safely.

FAQ

Questions about sheets_insert_sheet

What does the sheets_insert_sheet tool do? +

Add a new sheet to an existing Google Sheets spreadsheet. It is categorised as a Write tool in the Mcp Gsheets 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_insert_sheet? +

Register the Mcp Gsheets MCP server in PolicyLayer and add a rule for sheets_insert_sheet: 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 Gsheets. Nothing to install.

What risk level is sheets_insert_sheet? +

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

Can I rate-limit sheets_insert_sheet? +

Yes. Add a rate_limit block to the sheets_insert_sheet 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_insert_sheet completely? +

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

sheets_insert_sheet is provided by the Mcp Gsheets MCP server (mcp-gsheets). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.