create_pivot_table · Excel MCP: Risk & Policy

WHAT IT DOES

What create_pivot_table does on Excel

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

WHY IT NEEDS A POLICY

Why create_pivot_table needs a policy

Creating a pivot table modifies the workbook by adding a new object that aggregates and reorganizes data. This is a reversible write operation—the pivot table can be deleted. It does not execute arbitrary code, destroy data irreversibly, or move money. While it reorganizes data, the underlying source data remains intact.

From the tool's definition Tool name 'create_pivot_table' and description 'Create a pivot table' indicate data transformation and creation of new analytical structures within Excel.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_pivot_table Rate-limited

create_pivot_table 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": {
    "create_pivot_table": {
      "limits": [
        {
          "counter": "create_pivot_table_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Excel, so you can run agents against it safely.

FAQ

Questions about create_pivot_table

What does the create_pivot_table tool do? +

Create a pivot table. It is categorised as a Write tool in the Excel MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_pivot_table? +

Register the Excel MCP server in PolicyLayer and add a rule for create_pivot_table: 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 Excel. Nothing to install.

What risk level is create_pivot_table? +

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

Can I rate-limit create_pivot_table? +

Yes. Add a rate_limit block to the create_pivot_table 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 create_pivot_table completely? +

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

create_pivot_table is provided by the Excel MCP server (shmaxi/excel-mcp-server-node). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.