generate_scatter_chart · ECharts MCP Server MCP

WHAT IT DOES

What generate_scatter_chart does on ECharts MCP Server

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

WHY IT NEEDS A POLICY

Why generate_scatter_chart needs a policy

This tool creates a new visualization artifact (chart image/URL) based on input data, which is a form of data creation. However, it is reversible—the chart can be regenerated or discarded without consequence. It does not execute arbitrary code, delete data, or move money. The blast radius of misuse is minimal; generating unwanted charts is inconsequential.

From the tool's definition Tool generates and returns a preview URL for a scatter chart visualization. The description states it 'generates' a chart and the sibling tools all follow the pattern of 'generate_*_chart', indicating chart creation/rendering operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_scatter_chart Rate-limited

generate_scatter_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": {
    "generate_scatter_chart": {
      "limits": [
        {
          "counter": "generate_scatter_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 ECharts MCP Server, so you can run agents against it safely.

FAQ

Questions about generate_scatter_chart

What does the generate_scatter_chart tool do? +

Generate a scatter chart to show the relationship between two variables, helps discover their relationship or trends, such as, the strength of correlation, data distribution patterns. It is categorised as a Write tool in the ECharts 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 generate_scatter_chart? +

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

What risk level is generate_scatter_chart? +

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

Can I rate-limit generate_scatter_chart? +

Yes. Add a rate_limit block to the generate_scatter_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_scatter_chart completely? +

Set action: deny in the PolicyLayer policy for generate_scatter_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_scatter_chart? +

generate_scatter_chart is provided by the ECharts MCP Server MCP server (zhr7777777/echarts-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.