spreadsheet_delete_sheet

THE RISK

Critical Risk

Why spreadsheet_delete_sheet needs a policy

This tool irreversibly deletes data (a sheet tab) from a spreadsheet document. The description explicitly states the action 'cannot be undone', which is the hallmark of the Destructive category. While the blast radius is somewhat limited to a single sheet rather than an entire file, the permanent loss of spreadsheet data and its contents justifies 'high' severity.

From the tool's definition 'Delete a sheet tab from a Synology Spreadsheet. This action cannot be undone.'

Documented attack patterns abuse exactly the kind of access spreadsheet_delete_sheet gives an agent:

POLICY

How to control spreadsheet_delete_sheet

PolicyLayer is an MCP gateway — it sits between your AI agents and Synology Office, and nothing reaches the server without passing your rules. This is the rule we recommend for spreadsheet_delete_sheet:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "spreadsheet_delete_sheet"
  ]
}

spreadsheet_delete_sheet disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Synology Office — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Synology Office tools

Destructive calendar_delete_event Delete a Synology Calendar event permanently. Requires confirm=true. Destructive drive_delete_file Delete a file or folder in Synology Drive (moves to trash by default). Set confirm=true to Destructive spreadsheet_delete_file WARNING: Permanently delete an ENTIRE spreadsheet file (.osheet). Write spreadsheet_append_rows Append rows to the end of existing data in a Synology Spreadsheet sheet. Provide either fi Write drive_get_sharing_link Generate or retrieve a sharing link for a Synology Drive file with configurable permission Write calendar_create_calendar Create a new Synology Calendar. Write calendar_create_event Create a new Synology Calendar event. Requires confirm=true. Write calendar_update_event Update an existing Synology Calendar event. Requires confirm=true.

All 39 Synology Office tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in Synology Office → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about spreadsheet_delete_sheet

What does the spreadsheet_delete_sheet tool do? +

Delete a sheet tab from a Synology Spreadsheet. This action cannot be undone. Provide either file_id or name. Set confirm=true to execute. It is categorised as a Destructive tool in the Synology Office MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on spreadsheet_delete_sheet? +

Register the Synology Office MCP server in PolicyLayer and add a rule for spreadsheet_delete_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 Synology Office. Nothing to install.

What risk level is spreadsheet_delete_sheet? +

spreadsheet_delete_sheet is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit spreadsheet_delete_sheet? +

Yes. Add a rate_limit block to the spreadsheet_delete_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_delete_sheet completely? +

Set action: deny in the PolicyLayer policy for spreadsheet_delete_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_delete_sheet? +

spreadsheet_delete_sheet is provided by the Synology Office MCP server (vocweb/synology-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Synology Office tool call.

Start from Synology Office, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →