numbers.get_formulas

THE RISK

Low Risk

Why numbers.get_formulas needs a policy

This tool performs a read-only operation that queries and retrieves formula data from a spreadsheet without modifying, executing, or deleting any data. It has minimal blast radius as it only extracts existing information.

From the tool's definition Tool name is 'get_formulas' and description states it retrieves formulas from cells in a Numbers spreadsheet. Uses verbs 'Get' indicating data retrieval only. No modification, deletion, or execution capabilities mentioned.

Documented attack patterns abuse exactly the kind of access numbers.get_formulas gives an agent:

POLICY

How to control numbers.get_formulas

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "numbers.get_formulas": {}
  }
}

numbers.get_formulas 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 Orchard — 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

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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 numbers.get_formulas

What does the numbers.get_formulas tool do? +

Get formulas from cells in a Numbers spreadsheet. Optionally specify sheet, table, and range. It is categorised as a Read tool in the Orchard MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on numbers.get_formulas? +

Register the Orchard MCP server in PolicyLayer and add a rule for numbers.get_formulas: 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 Orchard. Nothing to install.

What risk level is numbers.get_formulas? +

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

Can I rate-limit numbers.get_formulas? +

Yes. Add a rate_limit block to the numbers.get_formulas 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 numbers.get_formulas completely? +

Set action: deny in the PolicyLayer policy for numbers.get_formulas. 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 numbers.get_formulas? +

numbers.get_formulas is provided by the Orchard MCP server (l22-io/orchard-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Orchard tool call.

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

CHECK YOUR STACK →