memento_notifications · Memento MCP: Risk & Policy

WHAT IT DOES

What memento_notifications does on Memento

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

WHY IT NEEDS A POLICY

Why memento_notifications needs a policy

The tool modifies notification configuration and dismissal state (reversible operations), classifying it as Write. Severity is medium because misuse could suppress important alerts or modify system behavior, but the impact is contained to notification management without data deletion or code execution. Confidence is 0.75 due to the generic description lacking detail on scope and persistence of changes.

From the tool's definition Tool performs actions including 'configure', 'dismiss' which modify notification state and settings; 'list' is read-only but the tool's primary capability includes state modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memento_notifications Rate-limited

memento_notifications 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": {
    "memento_notifications": {
      "limits": [
        {
          "counter": "memento_notifications_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 Memento, so you can run agents against it safely.

FAQ

Questions about memento_notifications

What does the memento_notifications tool do? +

Notifications. Actions: configure, list, dismiss. It is categorised as a Write tool in the Memento MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on memento_notifications? +

Register the Memento MCP server in PolicyLayer and add a rule for memento_notifications: 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 Memento. Nothing to install.

What risk level is memento_notifications? +

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

Can I rate-limit memento_notifications? +

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

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

memento_notifications is provided by the Memento MCP server (joyciakira/memento). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.