omarchy_hook

Run a named hook from ~/.config/omarchy/hooks/<name> and ~/.config/omarchy/hooks/<name>.d/. [group:hook] Args: [name] [args...]

SERVEROmarchy-MCP SOURCEhlsitechio/Omarchy-MCP

High RISK CLASS

Category Execute

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-hook.md

WHAT IT DOES

What omarchy_hook does on Omarchy-MCP

AI agents invoke omarchy_hook to trigger actions in Omarchy-MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why omarchy_hook is rated High

Executes user-defined shell scripts with configurable arguments, enabling arbitrary code execution.

From the tool's definition Run a named hook from ~/.config/omarchy/hooks/ with arbitrary args

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs omarchy_hook 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_hook, this is the rule to start with:

omarchy_hook Rate-limited

omarchy_hook stays usable, but rate-capped: a runaway agent can't fire it dozens of times 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_hook": {
      "limits": [
        {
          "counter": "omarchy_hook_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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_hook call is checked against it from then on.

FAQ

Questions about omarchy_hook

What does the omarchy_hook tool do? +

Run a named hook from ~/.config/omarchy/hooks/<name> and ~/.config/omarchy/hooks/<name>.d/. [group:hook] Args: [name] [args...]. It is categorised as a Execute tool in the Omarchy-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on omarchy_hook? +

Register the Omarchy MCP server in PolicyLayer and add a rule for omarchy_hook: 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_hook? +

omarchy_hook is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit omarchy_hook? +

Yes. Add a rate_limit block to the omarchy_hook 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_hook completely? +

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

omarchy_hook 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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