update_realm_ruleset · OpenRemote MCP Server MCP

WHAT IT DOES

What update_realm_ruleset does on OpenRemote MCP Server

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

WHY IT NEEDS A POLICY

Why update_realm_ruleset needs a policy

This tool modifies configuration data (rulesets) at the realm level in an access control / automation system. While reversible via another update, the high severity reflects that realm-level rulesets typically control system behavior, access rules, or automations across multiple users/assets.

From the tool's definition Tool description explicitly states 'Update an existing realm ruleset', which modifies data. The verb 'update' indicates a reversible write operation rather than deletion or destructive action.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_realm_ruleset Rate-limited

update_realm_ruleset 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": {
    "update_realm_ruleset": {
      "limits": [
        {
          "counter": "update_realm_ruleset_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 OpenRemote MCP Server, so you can run agents against it safely.

FAQ

Questions about update_realm_ruleset

What does the update_realm_ruleset tool do? +

Update an existing realm ruleset. First retrieve it with 'get_realm_ruleset', modify, then call this. It is categorised as a Write tool in the OpenRemote 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 update_realm_ruleset? +

Register the OpenRemote MCP Server MCP server in PolicyLayer and add a rule for update_realm_ruleset: 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 OpenRemote MCP Server. Nothing to install.

What risk level is update_realm_ruleset? +

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

Can I rate-limit update_realm_ruleset? +

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

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

update_realm_ruleset is provided by the OpenRemote MCP Server MCP server (openremote/service-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.