omarchy_default_set

SERVEROmarchy-MCP SOURCEhlsitechio/Omarchy-MCP

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/omarchy-mcp/omarchy-default-set.md

WHAT IT DOES

What omarchy_default_set does on Omarchy-MCP

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

RISK

Why omarchy_default_set is rated Medium

Modifies system configuration files (browser, editor, terminal defaults) with potential side effects affecting user environment and application behavior.

From the tool's definition Set locally available browser, editor, terminal defaults with config file restoration on failure

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs omarchy_default_set safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Omarchy-MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For omarchy_default_set, this is the rule to start with:

omarchy_default_set Rate-limited

omarchy_default_set 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": {
    "omarchy_default_set": {
      "limits": [
        {
          "counter": "omarchy_default_set_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Omarchy-MCP, apply this rule, and every omarchy_default_set call is checked against it from then on.

FAQ

Questions about omarchy_default_set

What does the omarchy_default_set tool do? +

Set a locally available browser, editor, terminal, or coding-agent default with before/after verification and exact byte/mode restoration of affected local config files on failure. Agent state is updated without invoking Omarchy. It is categorised as a Write tool in the Omarchy-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 omarchy_default_set? +

Register the Omarchy MCP server in PolicyLayer and add a rule for omarchy_default_set: 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 Omarchy-MCP. Nothing to install.

What risk level is omarchy_default_set? +

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

Can I rate-limit omarchy_default_set? +

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

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

omarchy_default_set is provided by the Omarchy MCP server (hlsitechio/Omarchy-MCP). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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