send-notification · NestJS MCP Server Module MCP

WHAT IT DOES

What send-notification does on NestJS MCP Server Module

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

WHY IT NEEDS A POLICY

Why send-notification needs a policy

This tool creates new notifications, which is a reversible data modification. It does not execute arbitrary code, delete data, or move money. However, the medium severity reflects that misuse could spam users, trigger unwanted communications, or be exploited for social engineering if an AI agent has unrestricted access to send notifications to any user without proper authorization checks.

From the tool's definition Tool name 'send-notification' and description 'Send a notification to a user' indicate a write operation that creates/modifies user notification state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send-notification Rate-limited

send-notification 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": {
    "send-notification": {
      "limits": [
        {
          "counter": "send-notification_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 NestJS MCP Server Module, so you can run agents against it safely.

FAQ

Questions about send-notification

What does the send-notification tool do? +

Send a notification to a user. It is categorised as a Write tool in the NestJS MCP Server Module MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on send-notification? +

Register the NestJS MCP Server Module MCP server in PolicyLayer and add a rule for send-notification: 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 NestJS MCP Server Module. Nothing to install.

What risk level is send-notification? +

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

Can I rate-limit send-notification? +

Yes. Add a rate_limit block to the send-notification 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 send-notification completely? +

Set action: deny in the PolicyLayer policy for send-notification. 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 send-notification? +

send-notification is provided by the NestJS MCP Server Module MCP server (rekog-labs/mcp-nest). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.