create_excel_chart · Office MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_excel_chart does on Office MCP Server

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

WHY IT NEEDS A POLICY

Why create_excel_chart needs a policy

Creating a chart in Excel is a reversible modification operation—charts can be deleted or modified. This falls under Write category rather than Read (not just querying data) or Destructive (not irreversibly deleting). The blast radius is medium because an AI could create misleading charts or clutter documents, but damage is easily undone by removing the chart.

From the tool's definition Tool name 'create_excel_chart' indicates creation of a new chart object in Excel. Server description states it enables 'creating, editing, and processing' documents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_excel_chart Rate-limited

create_excel_chart 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_excel_chart": {
      "limits": [
        {
          "counter": "create_excel_chart_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 Office MCP Server, so you can run agents against it safely.

FAQ

Questions about create_excel_chart

What does the create_excel_chart tool do? +

create_excel_chart. It is categorised as a Write tool in the Office 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_excel_chart? +

Register the Office MCP Server MCP server in PolicyLayer and add a rule for create_excel_chart: 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 Office MCP Server. Nothing to install.

What risk level is create_excel_chart? +

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

Can I rate-limit create_excel_chart? +

Yes. Add a rate_limit block to the create_excel_chart 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_excel_chart completely? +

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

create_excel_chart is provided by the Office MCP Server MCP server (walkingzzzy/office-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.