set_color_scheme · Sysprobe MCP: Risk & Policy

WHAT IT DOES

What set_color_scheme does on Sysprobe

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

WHY IT NEEDS A POLICY

Why set_color_scheme needs a policy

The tool modifies system state by applying a color scheme to the desktop environment. This is a reversible change (another scheme can be applied) with no data deletion or financial impact, placing it in the Write category. Severity is medium because while it affects user experience and desktop appearance, the blast radius is limited to cosmetic changes and does not compromise security or system integrity.

From the tool's definition Tool description states '[ACTION] Apply a KDE color scheme by name', using 'Apply' which indicates a state modification. The server description notes it 'requires explicit flags for mutating actions', confirming this is a write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_color_scheme Rate-limited

set_color_scheme 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": {
    "set_color_scheme": {
      "limits": [
        {
          "counter": "set_color_scheme_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 Sysprobe, so you can run agents against it safely.

FAQ

Questions about set_color_scheme

What does the set_color_scheme tool do? +

[ACTION] Apply a KDE color scheme by name (see list_color_schemes). It is categorised as a Write tool in the Sysprobe MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_color_scheme? +

Register the Sysprobe MCP server in PolicyLayer and add a rule for set_color_scheme: 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 Sysprobe. Nothing to install.

What risk level is set_color_scheme? +

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

Can I rate-limit set_color_scheme? +

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

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

set_color_scheme is provided by the Sysprobe MCP server (raindancer118/sysprobe-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.