draw_rectangle · farshid-mcp-imageProcessing MCP

WHAT IT DOES

What draw_rectangle does on farshid-mcp-imageProcessing

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

WHY IT NEEDS A POLICY

Why draw_rectangle needs a policy

This tool modifies an image by drawing a rectangle on it. It creates a new version of the image with the rectangle overlaid, which is a reversible write/modification operation. The original image can be preserved; the operation doesn't delete data or execute system commands.

From the tool's definition Draw a rectangle on an image

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draw_rectangle Rate-limited

draw_rectangle 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": {
    "draw_rectangle": {
      "limits": [
        {
          "counter": "draw_rectangle_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 farshid-mcp-imageProcessing, so you can run agents against it safely.

FAQ

Questions about draw_rectangle

What does the draw_rectangle tool do? +

Draw a rectangle on an image. It is categorised as a Write tool in the farshid-mcp-imageProcessing MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on draw_rectangle? +

Register the farshid-mcp-imageProcessing MCP server in PolicyLayer and add a rule for draw_rectangle: 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 farshid-mcp-imageProcessing. Nothing to install.

What risk level is draw_rectangle? +

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

Can I rate-limit draw_rectangle? +

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

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

draw_rectangle is provided by the farshid-mcp-imageProcessing MCP server (pirahansiah/farshid-mcp-imageprocessing). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.