toggle_high_contrast · Enhanced ADB MCP Server MCP

WHAT IT DOES

What toggle_high_contrast does on Enhanced ADB MCP Server

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

WHY IT NEEDS A POLICY

Why toggle_high_contrast needs a policy

This tool modifies a device display/accessibility setting (high contrast text). It is reversible—toggling it again restores the previous state—so it falls under Write rather than Destructive. The blast radius is low as it only affects text rendering appearance on the device.

From the tool's definition Enable or disable high contrast text

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

toggle_high_contrast Rate-limited

toggle_high_contrast 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": {
    "toggle_high_contrast": {
      "limits": [
        {
          "counter": "toggle_high_contrast_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 Enhanced ADB MCP Server, so you can run agents against it safely.

FAQ

Questions about toggle_high_contrast

What does the toggle_high_contrast tool do? +

Enable or disable high contrast text. It is categorised as a Write tool in the Enhanced ADB 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 toggle_high_contrast? +

Register the Enhanced ADB MCP Server MCP server in PolicyLayer and add a rule for toggle_high_contrast: 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 Enhanced ADB MCP Server. Nothing to install.

What risk level is toggle_high_contrast? +

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

Can I rate-limit toggle_high_contrast? +

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

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

toggle_high_contrast is provided by the Enhanced ADB MCP Server MCP server (rahulkr/r_adb_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.