generate_general_chart · ECharts MCP Server MCP

WHAT IT DOES

What generate_general_chart does on ECharts MCP Server

AI agents use generate_general_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_general_chart needs a policy

This tool creates a chart preview URL/link by processing input data and generating a new resource. It creates something new (a preview link) but has no destructive, financial, or execution side effects. It is reversible and low blast radius — worst case it generates an unintended chart visualization.

From the tool's definition Generate a chart preview link... Support following types: effectScatter, tree, treemap, sunburst, boxplot, candlestick, graph, sankey, funnel, gauge and themeRiver

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_general_chart Rate-limited

generate_general_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_general_chart": {
      "limits": [
        {
          "counter": "generate_general_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_general_chart

What does the generate_general_chart tool do? +

Generate a chart preview link(not a chart image). Support following types: effectScatter, tree, treemap, sunburst, boxplot, candlestick, graph, sankey, funnel, gauge and themeRiver. 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_general_chart? +

Register the ECharts MCP Server MCP server in PolicyLayer and add a rule for generate_general_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_general_chart? +

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

Can I rate-limit generate_general_chart? +

Yes. Add a rate_limit block to the generate_general_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_general_chart completely? +

Set action: deny in the PolicyLayer policy for generate_general_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_general_chart? +

generate_general_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.