format_range · Mcp Google Sheets MCP: Risk & Policy

WHAT IT DOES

What format_range does on Mcp Google Sheets

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

WHY IT NEEDS A POLICY

Why format_range needs a policy

Formatting operations modify spreadsheet state but are reversible and non-destructive. The tool fits the Write category (modifies data reversibly). Severity is medium because formatting changes are visible and could affect data presentation/interpretation, but they do not delete data, execute code, or create financial obligations.

From the tool's definition Tool name is 'format_range' from a Google Sheets MCP server. The server description emphasizes 'writing' capabilities, and sibling tools include write operations like 'add_columns', 'add_rows', 'batch_update', and 'batch_update_cells'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

format_range Rate-limited

format_range 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": {
    "format_range": {
      "limits": [
        {
          "counter": "format_range_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 Sheets, so you can run agents against it safely.

FAQ

Questions about format_range

What does the format_range tool do? +

format_range. It is categorised as a Write tool in the Mcp Google Sheets MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on format_range? +

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

What risk level is format_range? +

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

Can I rate-limit format_range? +

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

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

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