watermark_diagonal · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What watermark_diagonal does on SVG Canvas MCP

AI agents use watermark_diagonal 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 watermark_diagonal needs a policy

This tool creates or modifies SVG content by adding a watermark element. While it changes the graphic, the modification is reversible (the watermark can be removed or edited), placing it in the Write category rather than Destructive. The severity is low because watermark application has minimal blast radius—it only adds a visual overlay with no side effects on data, system resources, or external operations.

From the tool's definition Tool name 'watermark_diagonal' and description indicating application of diagonal text watermark ('대각선 텍스트 워터마크를 적용합니다' = 'applies diagonal text watermark').

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

watermark_diagonal Rate-limited

watermark_diagonal 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": {
    "watermark_diagonal": {
      "limits": [
        {
          "counter": "watermark_diagonal_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 watermark_diagonal

What does the watermark_diagonal tool do? +

대각선 텍스트 워터마크를 적용합니다. 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 watermark_diagonal? +

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

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

Can I rate-limit watermark_diagonal? +

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

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

watermark_diagonal 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.