numbers_set_cell

Write a value to a single cell. Numbers and booleans land as native cell types (not

SERVERAirMCP SOURCEairmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/heznpc-airmcp/numbers-set-cell.md

WHAT IT DOES

What numbers_set_cell does on AirMCP

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

RISK

Why numbers_set_cell is rated Medium

This tool creates or modifies data in Apple Numbers (spreadsheet application) in a reversible manner. It writes to individual cells, which is a typical Write operation. Severity is medium because misuse could corrupt or overwrite spreadsheet data across potentially many cells if called repeatedly by an agent, but the effect is reversible (undo available) and localized to a single cell per invocation.

From the tool's definition Tool name 'numbers_set_cell' and description 'Write a value to a single cell' explicitly indicates modification of spreadsheet data. Numbers and booleans are written as native cell types.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs numbers_set_cell safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AirMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For numbers_set_cell, this is the rule to start with:

numbers_set_cell Rate-limited

numbers_set_cell 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": {
    "numbers_set_cell": {
      "limits": [
        {
          "counter": "numbers_set_cell_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AirMCP, apply this rule, and every numbers_set_cell call is checked against it from then on.

FAQ

Questions about numbers_set_cell

What does the numbers_set_cell tool do? +

Write a value to a single cell. Numbers and booleans land as native cell types (not. It is categorised as a Write tool in the AirMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on numbers_set_cell? +

Register the Air MCP server in PolicyLayer and add a rule for numbers_set_cell: 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 AirMCP. Nothing to install.

What risk level is numbers_set_cell? +

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

Can I rate-limit numbers_set_cell? +

Yes. Add a rate_limit block to the numbers_set_cell 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_set_cell completely? +

Set action: deny in the PolicyLayer policy for numbers_set_cell. 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_set_cell? +

numbers_set_cell is provided by the Air MCP server (airmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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