sheets_format · Gworkspace MCP: Risk & Policy

WHAT IT DOES

What sheets_format does on Gworkspace

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

WHY IT NEEDS A POLICY

Why sheets_format needs a policy

The tool creates or modifies data reversibly by applying visual formatting to spreadsheet cells. It does not delete data, execute arbitrary code, move money, or trigger destructive actions. Formatting changes can be undone, making it a Write operation. Severity is low because formatting mishaps have minimal business impact and are easily correctable.

From the tool's definition Tool modifies spreadsheet formatting (colors, horizontal alignment) on a range of cells. The description indicates it performs formatting operations: 'Format a range. Colors as hex (#RRGGBB).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sheets_format Rate-limited

sheets_format 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_format": {
      "limits": [
        {
          "counter": "sheets_format_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 Gworkspace, so you can run agents against it safely.

FAQ

Questions about sheets_format

What does the sheets_format tool do? +

Format a range. Colors as hex (#RRGGBB). h_align: LEFT/CENTER/RIGHT. It is categorised as a Write tool in the Gworkspace 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_format? +

Register the Gworkspace MCP server in PolicyLayer and add a rule for sheets_format: 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 Gworkspace. Nothing to install.

What risk level is sheets_format? +

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

Can I rate-limit sheets_format? +

Yes. Add a rate_limit block to the sheets_format 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_format completely? +

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

sheets_format is provided by the Gworkspace MCP server (leoonic/gworkspace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.