create-table · Quickchart MCP: Risk & Policy

WHAT IT DOES

What create-table does on Quickchart

AI agents use create-table 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-table needs a policy

This tool creates new visualization files (table images) and can save them to disk, which are Write operations—data is created or modified reversibly. There is no deletion, execution of arbitrary code, financial impact, or destructive behavior. The severity is low because creating chart/table images has minimal blast radius; the worst outcome would be unwanted image files or disk space consumption.

From the tool's definition Tool description states 'Create table images' and 'save table image to file', indicating creation of new data/files. The sibling tools (create-chart, create-barcode, create-qr-code, etc.) all follow a 'create-*' pattern consistent with Write operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-table Rate-limited

create-table 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-table": {
      "limits": [
        {
          "counter": "create-table_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-table

What does the create-table tool do? +

Create table images using QuickChart - get table image URL or save table 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-table? +

Register the Quickchart MCP server in PolicyLayer and add a rule for create-table: 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-table? +

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

Can I rate-limit create-table? +

Yes. Add a rate_limit block to the create-table 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-table completely? +

Set action: deny in the PolicyLayer policy for create-table. 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-table? +

create-table 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.