tool_add_plot_to_graph · origin- MCP: Risk & Policy

WHAT IT DOES

What tool_add_plot_to_graph does on origin-MCP

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

WHY IT NEEDS A POLICY

Why tool_add_plot_to_graph needs a policy

This tool modifies a graph by adding a curve or plot to it, which is a reversible data creation operation. It does not execute arbitrary code, delete data, move money, or trigger external operations. The modification is non-destructive and can be undone. Severity is low because the worst-case misuse would be adding unwanted plots to scientific graphs, which has limited blast radius in a plotting context.

From the tool's definition Tool description states 'Add a new curve to an existing graph' and 'append a data plot to it' — these are write operations that create new data visualization elements and modify an existing graph.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tool_add_plot_to_graph Rate-limited

tool_add_plot_to_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": {
    "tool_add_plot_to_graph": {
      "limits": [
        {
          "counter": "tool_add_plot_to_graph_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 origin-MCP, so you can run agents against it safely.

FAQ

Questions about tool_add_plot_to_graph

What does the tool_add_plot_to_graph tool do? +

Add a new curve to an existing graph. Find the graph by name and append a data plot to it. It is categorised as a Write tool in the origin-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tool_add_plot_to_graph? +

Register the origin- MCP server in PolicyLayer and add a rule for tool_add_plot_to_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 origin-MCP. Nothing to install.

What risk level is tool_add_plot_to_graph? +

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

Can I rate-limit tool_add_plot_to_graph? +

Yes. Add a rate_limit block to the tool_add_plot_to_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 tool_add_plot_to_graph completely? +

Set action: deny in the PolicyLayer policy for tool_add_plot_to_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 tool_add_plot_to_graph? +

tool_add_plot_to_graph is provided by the origin- MCP server (zhang-923-ze/origin-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.