create_table · Excel MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_table does on Excel MCP Server

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

WHY IT NEEDS A POLICY

Why create_table needs a policy

Creating a table is a reversible modification operation that organizes existing data into a structured Excel table format. It does not execute arbitrary code, delete data irreversibly, or move money. While it modifies the workbook, the operation can be undone, and the underlying data remains accessible.

From the tool's definition Tool name 'create_table' and description states it 'Creates a native Excel table from a specified range of data.' This is a creation operation that modifies workbook structure by converting a data range into a formatted table object.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_table Rate-limited

create_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_table": {
      "limits": [
        {
          "counter": "create_table_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about create_table

What does the create_table tool do? +

Creates a native Excel table from a specified range of data. It is categorised as a Write tool in the Excel MCP Server 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_table? +

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

What risk level is create_table? +

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

Can I rate-limit create_table? +

Yes. Add a rate_limit block to the create_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_table completely? +

Set action: deny in the PolicyLayer policy for create_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_table? +

create_table is provided by the Excel MCP Server MCP server (thibaudvandendooren-acumen/excel-mcp-server-v2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.