plot_funding_trend · VayuChat MCP: Risk & Policy

WHAT IT DOES

What plot_funding_trend does on VayuChat MCP

AI agents invoke plot_funding_trend to trigger actions in VayuChat MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why plot_funding_trend needs a policy

This tool executes Python code with matplotlib to generate visualizations. While it is primarily a read/display operation, it involves code execution in the server environment to produce charts. It does not write persistent data or perform destructive actions, but misuse could trigger resource-intensive computations.

From the tool's definition 'Plot funding trends over years by city' — generates a matplotlib visualization, which involves executing Python/pandas code to process data and render output

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

plot_funding_trend Rate-limited

plot_funding_trend stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "plot_funding_trend": {
      "limits": [
        {
          "counter": "plot_funding_trend_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about plot_funding_trend

What does the plot_funding_trend tool do? +

Plot funding trends over years by city. It is categorised as a Execute tool in the VayuChat MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on plot_funding_trend? +

Register the VayuChat MCP server in PolicyLayer and add a rule for plot_funding_trend: 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 VayuChat MCP. Nothing to install.

What risk level is plot_funding_trend? +

plot_funding_trend is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit plot_funding_trend? +

Yes. Add a rate_limit block to the plot_funding_trend 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 plot_funding_trend completely? +

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

plot_funding_trend is provided by the VayuChat MCP server (nipunbatra/vayuchat-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.