spreadsheet_get_styles

THE RISK

Low Risk

Why spreadsheet_get_styles needs a policy

This tool queries and retrieves formatting metadata (fonts, colors, alignment, number formats) from a spreadsheet without creating, modifying, or deleting any data. It is purely informational and poses minimal risk if misused by an AI agent.

From the tool's definition Tool name uses 'get' verb and description explicitly states 'Get cell styling information' — a read-only retrieval operation with no data modification, deletion, or side effects.

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

POLICY

How to control spreadsheet_get_styles

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_get_styles:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "spreadsheet_get_styles": {}
  }
}

spreadsheet_get_styles is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Synology Office tools

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about spreadsheet_get_styles

What does the spreadsheet_get_styles tool do? +

Get cell styling information (fonts, colors, alignment, number formats) for a range in a Synology Spreadsheet. Provide either file_id or name. It is categorised as a Read tool in the Synology Office MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on spreadsheet_get_styles? +

Register the Synology Office MCP server in PolicyLayer and add a rule for spreadsheet_get_styles: 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_get_styles? +

spreadsheet_get_styles is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit spreadsheet_get_styles? +

Yes. Add a rate_limit block to the spreadsheet_get_styles 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_get_styles completely? +

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

spreadsheet_get_styles 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 →