excel_create_workbook

Create a new empty Excel workbook (.xlsx) in the user

SERVERSage MCP SOURCEsagemcp/sagemcp

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/sagemcp-sagemcp/excel-create-workbook.md

WHAT IT DOES

What excel_create_workbook does on Sage MCP

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

RISK

Why excel_create_workbook is rated Medium

Creating a new workbook is reversible (can be deleted) and non-destructive. It modifies the user's filesystem by adding a new file but does not execute arbitrary code, delete data, or move money. This is a straightforward Write category action with low severity since the blast radius of creating an empty workbook is minimal—worst case is cluttered storage or unintended file creation.

From the tool's definition Tool creates a new empty Excel workbook (.xlsx), which is a write operation that creates a new file. The description explicitly states 'Create a new empty Excel workbook'.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs excel_create_workbook safely

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

excel_create_workbook Rate-limited

excel_create_workbook 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": {
    "excel_create_workbook": {
      "limits": [
        {
          "counter": "excel_create_workbook_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 Sage MCP, apply this rule, and every excel_create_workbook call is checked against it from then on.

FAQ

Questions about excel_create_workbook

What does the excel_create_workbook tool do? +

Create a new empty Excel workbook (.xlsx) in the user. It is categorised as a Write tool in the Sage MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on excel_create_workbook? +

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

What risk level is excel_create_workbook? +

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

Can I rate-limit excel_create_workbook? +

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

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

excel_create_workbook is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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