create_subscription · OneSignal MCP Server MCP

WHAT IT DOES

What create_subscription does on OneSignal MCP Server

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

WHY IT NEEDS A POLICY

Why create_subscription needs a policy

An AI agent can call create_subscription faster than any human can review — one bad instruction and it creates or modifies resources in OneSignal MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_subscription Rate-limited

create_subscription 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": {
    "create_subscription": {
      "limits": [
        {
          "counter": "create_subscription_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 OneSignal MCP Server, so you can run agents against it safely.

FAQ

Questions about create_subscription

What does the create_subscription tool do? +

Create a new subscription for a user. It is categorised as a Write tool in the OneSignal 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 create_subscription? +

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

What risk level is create_subscription? +

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

Can I rate-limit create_subscription? +

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

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

create_subscription is provided by the OneSignal MCP Server MCP server (weirdbrains/onesignal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.