create-chart-using-chartjs · Quickchart MCP: Risk & Policy

WHAT IT DOES

What create-chart-using-chartjs does on Quickchart

AI agents use create-chart-using-chartjs to create or update resources in Quickchart — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Quickchart environment.

WHY IT NEEDS A POLICY

Why create-chart-using-chartjs needs a policy

This tool creates new chart artifacts and can save images to the file system. These are reversible write operations—charts can be deleted or overwritten. There is no code execution, data deletion, or financial impact. The blast radius if misused (e.g., filling disk with many large images) is limited and recoverable. Classification as Write is appropriate.

From the tool's definition Tool name and description indicate creation of charts: 'create-chart-using-chartjs' with ability to 'save chart image to file'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-chart-using-chartjs Rate-limited

create-chart-using-chartjs 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-chart-using-chartjs": {
      "limits": [
        {
          "counter": "create-chart-using-chartjs_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 Quickchart, so you can run agents against it safely.

FAQ

Questions about create-chart-using-chartjs

What does the create-chart-using-chartjs tool do? +

Create a chart using QuickChart.io - get chart image URL or save chart image to file. It is categorised as a Write tool in the Quickchart 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-chart-using-chartjs? +

Register the Quickchart MCP server in PolicyLayer and add a rule for create-chart-using-chartjs: 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 Quickchart. Nothing to install.

What risk level is create-chart-using-chartjs? +

create-chart-using-chartjs is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create-chart-using-chartjs? +

Yes. Add a rate_limit block to the create-chart-using-chartjs 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-chart-using-chartjs completely? +

Set action: deny in the PolicyLayer policy for create-chart-using-chartjs. 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-chart-using-chartjs? +

create-chart-using-chartjs is provided by the Quickchart MCP server (takanarishimbo/quickchart-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.