diagram_sequence · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What diagram_sequence does on SVG Canvas MCP

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

WHY IT NEEDS A POLICY

Why diagram_sequence needs a policy

Generating diagrams is a Write operation—it creates new data artifacts that are reversible (can be edited, deleted, or regenerated). It does not execute arbitrary code, destroy data, or modify external systems. The medium severity reflects that misuse could result in resource consumption or creation of unwanted outputs, but the operation is non-destructive and sandbox-contained within the SVG canvas context.

From the tool's definition Tool generates sequence diagrams, which creates new graphical content that can be stored and modified. Description states '시퀀스 다이어그램을 생성합니다' (generates/creates sequence diagrams). This is a creation operation on SVG canvas data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

diagram_sequence Rate-limited

diagram_sequence 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": {
    "diagram_sequence": {
      "limits": [
        {
          "counter": "diagram_sequence_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 SVG Canvas MCP, so you can run agents against it safely.

FAQ

Questions about diagram_sequence

What does the diagram_sequence tool do? +

시퀀스 다이어그램을 생성합니다. It is categorised as a Write tool in the SVG Canvas 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 diagram_sequence? +

Register the SVG Canvas MCP server in PolicyLayer and add a rule for diagram_sequence: 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 SVG Canvas MCP. Nothing to install.

What risk level is diagram_sequence? +

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

Can I rate-limit diagram_sequence? +

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

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

diagram_sequence is provided by the SVG Canvas MCP server (kim62210/svg-canvas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.