start_live_activity · OneSignal MCP Server MCP

WHAT IT DOES

What start_live_activity does on OneSignal MCP Server

AI agents invoke start_live_activity to trigger actions in OneSignal MCP Server. 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.

WHY IT NEEDS A POLICY

Why start_live_activity needs a policy

start_live_activity triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

start_live_activity Rate-limited

start_live_activity 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": {
    "start_live_activity": {
      "limits": [
        {
          "counter": "start_live_activity_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 start_live_activity

What does the start_live_activity tool do? +

Start a new iOS Live Activity. It is categorised as a Execute tool in the OneSignal MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on start_live_activity? +

Register the OneSignal MCP Server MCP server in PolicyLayer and add a rule for start_live_activity: 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 start_live_activity? +

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

Can I rate-limit start_live_activity? +

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

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

start_live_activity 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.