spreadsheet_add_sheet · LibreOffice MCP Tools MCP

WHAT IT DOES

What spreadsheet_add_sheet does on LibreOffice MCP Tools

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

WHY IT NEEDS A POLICY

Why spreadsheet_add_sheet needs a policy

The tool creates new structural elements within a spreadsheet document, which qualifies as Write category. Severity is medium because while the action is reversible and doesn't permanently destroy data, creating unexpected sheets in financial or critical spreadsheets could cause confusion, data organization issues, or be used to inject malicious content.

From the tool's definition Tool adds a new sheet to a spreadsheet workbook. This is a create/modify operation on spreadsheet data that is reversible (the sheet can be deleted).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spreadsheet_add_sheet Rate-limited

spreadsheet_add_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": {
    "spreadsheet_add_sheet": {
      "limits": [
        {
          "counter": "spreadsheet_add_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 LibreOffice MCP Tools, so you can run agents against it safely.

FAQ

Questions about spreadsheet_add_sheet

What does the spreadsheet_add_sheet tool do? +

Add a new sheet to a spreadsheet workbook. It is categorised as a Write tool in the LibreOffice MCP Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on spreadsheet_add_sheet? +

Register the LibreOffice MCP Tools MCP server in PolicyLayer and add a rule for spreadsheet_add_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 LibreOffice MCP Tools. Nothing to install.

What risk level is spreadsheet_add_sheet? +

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

Can I rate-limit spreadsheet_add_sheet? +

Yes. Add a rate_limit block to the spreadsheet_add_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 spreadsheet_add_sheet completely? +

Set action: deny in the PolicyLayer policy for spreadsheet_add_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 spreadsheet_add_sheet? +

spreadsheet_add_sheet is provided by the LibreOffice MCP Tools MCP server (passerbyflutter/libreoffice-mcp-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.