generate_pie_chart

THE RISK

Medium Risk

Why generate_pie_chart needs a policy

This tool creates chart visualizations (pie charts in SVG format) as output artifacts. While it produces new data/content, it is reversible (charts can be deleted or regenerated), has no side effects on external systems, and poses minimal risk if misused. The 'generate' verb combined with chart-generation context indicates content creation rather than execution of arbitrary commands or destructive operations.

From the tool's definition Tool name contains 'generate' and description states 'Generate a pie chart'; the tool creates SVG chart output that is stored or transmitted but does not execute arbitrary code, modify external data, or produce financial transactions.

Documented attack patterns abuse exactly the kind of access generate_pie_chart gives an agent:

POLICY

How to control generate_pie_chart

PolicyLayer is an MCP gateway — it sits between your AI agents and Chart Offline, and nothing reaches the server without passing your rules. This is the rule we recommend for generate_pie_chart:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_pie_chart": {
      "limits": [
        {
          "counter": "generate_pie_chart_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

generate_pie_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.

Create a free account and register Chart Offline — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Chart Offline tools

Write generate_area_chart Generate a area chart to show data trends under continuous independent variables and obser Write generate_bar_chart Generate a bar chart to show data for numerical comparisons among different categories, su Write generate_column_chart Generate a column chart, which are best for comparing categorical data, such as, when valu Write generate_dual_axes_chart Generate a dual axes chart which is a combination chart that integrates two different char Write generate_fishbone_diagram Generate a fishbone diagram chart to uses a fish skeleton, like structure to display the c Write generate_flow_diagram Generate a flow diagram chart to show the steps and decision points of a process or system Write generate_histogram_chart Generate a histogram chart to show the frequency of data points within a certain range. It Write generate_line_chart Generate a line chart to show trends over time, such as, the ratio of Apple computer sales

All 15 Chart Offline tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about generate_pie_chart

What does the generate_pie_chart tool do? +

Generate a pie chart to show the proportion of parts, such as, market share and budget allocation. It is categorised as a Write tool in the Chart Offline MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_pie_chart? +

Register the Chart Offline MCP server in PolicyLayer and add a rule for generate_pie_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 Chart Offline. Nothing to install.

What risk level is generate_pie_chart? +

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

Can I rate-limit generate_pie_chart? +

Yes. Add a rate_limit block to the generate_pie_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 generate_pie_chart completely? +

Set action: deny in the PolicyLayer policy for generate_pie_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 generate_pie_chart? +

generate_pie_chart is provided by the Chart Offline MCP server (liukeyu800/mcp-server-chart-offline). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Chart Offline tool call.

Start from Chart Offline, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →