createActivitySubscription · Xdevplatform/x MCP

WHAT IT DOES

What createActivitySubscription does on Xdevplatform/xmcp

AI agents use createActivitySubscription to create or update resources in Xdevplatform/xmcp — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Xdevplatform/xmcp environment.

WHY IT NEEDS A POLICY

Why createActivitySubscription needs a policy

This tool creates a new subscription resource, which is a reversible write operation. It modifies system state by adding a notification subscription but does not delete data (Destructive), execute arbitrary code (Execute), move money (Financial), or retrieve data without side effects (Read).

From the tool's definition Tool name is 'createActivitySubscription' and description states 'Create an activity subscription to receive notifications.' The verb 'Create' and explicit mention of creating a subscription indicate a write operation that establishes a new…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createActivitySubscription Rate-limited

createActivitySubscription 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": {
    "createActivitySubscription": {
      "limits": [
        {
          "counter": "createactivitysubscription_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 Xdevplatform/xmcp, so you can run agents against it safely.

FAQ

Questions about createActivitySubscription

What does the createActivitySubscription tool do? +

Create an activity subscription to receive notifications. It is categorised as a Write tool in the Xdevplatform/xmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on createActivitySubscription? +

Register the Xdevplatform/x MCP server in PolicyLayer and add a rule for createActivitySubscription: 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 Xdevplatform/xmcp. Nothing to install.

What risk level is createActivitySubscription? +

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

Can I rate-limit createActivitySubscription? +

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

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

createActivitySubscription is provided by the Xdevplatform/x MCP server (xdevplatform/xmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.