color_set_html · Open Brush MCP Server MCP: Risk & Policy

WHAT IT DOES

What color_set_html does on Open Brush MCP Server

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

WHY IT NEEDS A POLICY

Why color_set_html needs a policy

This tool modifies application state (color configuration) without deleting data or executing arbitrary code. It is reversible—the user can change the color again. While it affects the 3D painting being created, the impact is limited to aesthetic properties and does not directly execute external commands, destroy data, or create financial obligations.

From the tool's definition Tool name 'color_set_html' combined with description 'Sets color with HTML/CSS value' indicates a modification operation that changes the state of the Open Brush application. The tool modifies color settings, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

color_set_html Rate-limited

color_set_html 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": {
    "color_set_html": {
      "limits": [
        {
          "counter": "color_set_html_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 Open Brush MCP Server, so you can run agents against it safely.

FAQ

Questions about color_set_html

What does the color_set_html tool do? +

Sets color with HTML/CSS value. It is categorised as a Write tool in the Open Brush MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on color_set_html? +

Register the Open Brush MCP Server MCP server in PolicyLayer and add a rule for color_set_html: 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 Open Brush MCP Server. Nothing to install.

What risk level is color_set_html? +

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

Can I rate-limit color_set_html? +

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

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

color_set_html is provided by the Open Brush MCP Server MCP server (moz411/openbrush-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.