generate_heatmap_chart · ECharts MCP Server MCP

WHAT IT DOES

What generate_heatmap_chart does on ECharts MCP Server

AI agents use generate_heatmap_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_heatmap_chart needs a policy

The tool generates a new artifact (a preview link/URL for a heatmap chart) from input data. This is a creation/write operation with no destructive, financial, or execution side effects. The blast radius is low since it only produces a visualization link.

From the tool's definition "Generate a heatmap chart preview link" — creates a new chart resource/URL from provided data

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_heatmap_chart Rate-limited

generate_heatmap_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_heatmap_chart": {
      "limits": [
        {
          "counter": "generate_heatmap_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_heatmap_chart

What does the generate_heatmap_chart tool do? +

Generate a heatmap chart preview link(not a chart image) which mainly use colors to represent values, which must be used along with visualMap component. 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_heatmap_chart? +

Register the ECharts MCP Server MCP server in PolicyLayer and add a rule for generate_heatmap_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_heatmap_chart? +

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

Can I rate-limit generate_heatmap_chart? +

Yes. Add a rate_limit block to the generate_heatmap_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_heatmap_chart completely? +

Set action: deny in the PolicyLayer policy for generate_heatmap_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_heatmap_chart? +

generate_heatmap_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.