generate_scatter_chart

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.

ServerChart Offline
CategoryWrite

How to control generate_scatter_chart ↓

WHAT IT DOES

What generate_scatter_chart does on Chart Offline

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

THE RISK

Medium Risk

Why generate_scatter_chart needs a policy

This tool creates visual chart artifacts from input data without network dependencies or external side effects. It is generative (Write) rather than merely retrieving data (Read), as it synthesizes a new SVG output. However, the output is a reversible, non-destructive visualization with no persistent storage, code execution, financial impact, or ability to modify existing data systems.

From the tool's definition Tool generates and creates SVG chart output (scatter chart visualization) based on input data. The verb 'Generate' combined with creation of chart artifacts constitutes data creation/output generation.

Documented attack patterns abuse exactly the kind of access generate_scatter_chart gives an agent:

POLICY

How to control generate_scatter_chart

PolicyLayer is an MCP gateway — it sits between your AI agents and Chart Offline, and nothing reaches the server without passing your rules. This is the rule we recommend for generate_scatter_chart:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_scatter_chart": {
      "limits": [
        {
          "counter": "generate_scatter_chart_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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.

Create a free account and register Chart Offline — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

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 Chart Offline 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 Chart Offline 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 Chart Offline. 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 Chart Offline MCP server (liukeyu800/mcp-server-chart-offline). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Chart Offline tool call.

Start from Chart Offline, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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