sheets_add_table · Gworkspace MCP: Risk & Policy

WHAT IT DOES

What sheets_add_table does on Gworkspace

AI agents use sheets_add_table 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_add_table needs a policy

The tool creates a new table structure within Google Sheets, which is a Write action (creates data reversibly). While table creation itself is not destructive, it modifies the spreadsheet state and could indirectly affect existing data organization if misused by an agent. Severity is medium because the blast radius is limited to a single spreadsheet's structure and can be undone by deleting the table.

From the tool's definition Tool name 'sheets_add_table' and description 'Create a Google Sheets Table' indicate the tool creates a new structured data object within a spreadsheet. This is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sheets_add_table Rate-limited

sheets_add_table 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_add_table": {
      "limits": [
        {
          "counter": "sheets_add_table_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_add_table

What does the sheets_add_table tool do? +

Create a Google Sheets Table (the structured table feature, Ctrl+Alt+T). 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_add_table? +

Register the Gworkspace MCP server in PolicyLayer and add a rule for sheets_add_table: 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_add_table? +

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

Can I rate-limit sheets_add_table? +

Yes. Add a rate_limit block to the sheets_add_table 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_add_table completely? +

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

sheets_add_table 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.