generate_network_graph · Chart MCP Server MCP: Risk & Policy

WHAT IT DOES

What generate_network_graph does on Chart MCP Server

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

WHY IT NEEDS A POLICY

Why generate_network_graph needs a policy

This tool creates (generates) a new network graph visualization, which is a form of data creation. The output is a chart/diagram artifact that can be modified or discarded without permanent consequences to underlying systems. This qualifies as Write rather than Execute because it produces structured visual output rather than executing arbitrary code or triggering external side effects.

From the tool's definition Tool name 'generate_network_graph' and description indicate chart/diagram generation. The server context shows 15 types of chart generation tools (line, bar, pie, radar, word cloud, mind map, etc.) all producing visual outputs.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_network_graph Rate-limited

generate_network_graph 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_network_graph": {
      "limits": [
        {
          "counter": "generate_network_graph_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Chart MCP Server, so you can run agents against it safely.

FAQ

Questions about generate_network_graph

What does the generate_network_graph tool do? +

生成优雅的网络图. It is categorised as a Write tool in the Chart 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_network_graph? +

Register the Chart MCP Server MCP server in PolicyLayer and add a rule for generate_network_graph: 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 MCP Server. Nothing to install.

What risk level is generate_network_graph? +

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

Can I rate-limit generate_network_graph? +

Yes. Add a rate_limit block to the generate_network_graph 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_network_graph completely? +

Set action: deny in the PolicyLayer policy for generate_network_graph. 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_network_graph? +

generate_network_graph is provided by the Chart MCP Server MCP server (qingfeng0512/chart-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.