style_fill · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What style_fill does on SVG Canvas MCP

AI agents use style_fill 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_fill needs a policy

The tool creates or modifies SVG object styling (fill properties) reversibly. This is a Write operation—it changes visual presentation without destroying data, executing code, or affecting external systems. Severity is low because misuse would only affect the current graphic's appearance and can be easily undone by changing the fill again.

From the tool's definition Tool description translates to 'Sets the fill of an object.' This modifies SVG styling properties (fill color/pattern) which are reversible changes to graphic attributes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

style_fill Rate-limited

style_fill 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_fill": {
      "limits": [
        {
          "counter": "style_fill_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_fill

What does the style_fill tool do? +

객체의 채우기를 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_fill? +

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

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

Can I rate-limit style_fill? +

Yes. Add a rate_limit block to the style_fill 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_fill completely? +

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

style_fill 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.