create_chart · Superset MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_chart does on Superset MCP Server

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

WHY IT NEEDS A POLICY

Why create_chart needs a policy

This tool creates new chart objects within Superset, which is a write operation that modifies the dashboard/charting state. While charts can typically be deleted or modified later (making it reversible), misuse could create many unwanted charts consuming resources or cluttering the interface. It does not execute arbitrary queries (that is handled by execute_sql), delete data (Destructive), or move money (Financial).

From the tool's definition Tool name 'create_chart' and description 'Create a new chart in Superset' indicates creation of new data artifacts. The tool creates persistent chart objects that can be stored and referenced later, which is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_chart Rate-limited

create_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_chart": {
      "limits": [
        {
          "counter": "create_chart_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 Superset MCP Server, so you can run agents against it safely.

FAQ

Questions about create_chart

What does the create_chart tool do? +

Create a new chart in Superset. IMPORTANT: You MUST provide metrics and x_axis for the chart to display data. Use get_dataset_schema first to get available columns. It is categorised as a Write tool in the Superset 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_chart? +

Register the Superset MCP Server MCP server in PolicyLayer and add a rule for create_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 Superset MCP Server. Nothing to install.

What risk level is create_chart? +

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

Can I rate-limit create_chart? +

Yes. Add a rate_limit block to the create_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_chart completely? +

Set action: deny in the PolicyLayer policy for create_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_chart? +

create_chart is provided by the Superset MCP Server MCP server (okybaguslukmana/superset-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.