excel_chart_from_data_range · Excel Finance MCP

WHAT IT DOES

What excel_chart_from_data_range does on Excel Finance MCP

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

WHY IT NEEDS A POLICY

Why excel_chart_from_data_range needs a policy

This tool creates a new chart object within an Excel workbook, which is a reversible write operation. It modifies the workbook by adding a chart, but does not delete data or trigger financial transactions. Severity is medium because it modifies financial workbooks that may be used for reporting.

From the tool's definition Create a native Excel chart from existing Excel data

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

excel_chart_from_data_range Rate-limited

excel_chart_from_data_range 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_chart_from_data_range": {
      "limits": [
        {
          "counter": "excel_chart_from_data_range_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about excel_chart_from_data_range

What does the excel_chart_from_data_range tool do? +

Create a native Excel chart from existing Excel data (requires data to be pre-loaded). It is categorised as a Write tool in the Excel Finance 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_chart_from_data_range? +

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

What risk level is excel_chart_from_data_range? +

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

Can I rate-limit excel_chart_from_data_range? +

Yes. Add a rate_limit block to the excel_chart_from_data_range 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_chart_from_data_range completely? +

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

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