style_opacity · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What style_opacity does on SVG Canvas MCP

AI agents use style_opacity 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 style_opacity needs a policy

This tool modifies the opacity/transparency property of SVG elements, which is a reversible visual style change. It does not execute code, delete data, or cause financial impact. It fits the Write category as it updates object properties without permanent destruction. Severity is low because opacity changes are non-consequential cosmetic modifications to SVG graphics that can be easily undone.

From the tool's definition Tool name 'style_opacity' and description 'Sets the opacity of an object' (translated from Korean) indicates modification of visual properties of SVG objects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

style_opacity Rate-limited

style_opacity 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": {
    "style_opacity": {
      "limits": [
        {
          "counter": "style_opacity_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 style_opacity

What does the style_opacity tool do? +

객체의 불투명도를 설정합니다. 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 style_opacity? +

Register the SVG Canvas MCP server in PolicyLayer and add a rule for style_opacity: 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 style_opacity? +

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

Can I rate-limit style_opacity? +

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

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

style_opacity 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.