AI agents use pushplus_send_msg to create or update resources in Notify MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Notify MCP Server environment.
This is a Write operation: it delivers messages through an external notification platform (PushPlus), which creates new message records and side effects (user notifications). It is not Destructive (messages are not deleted), not Financial (no money moves), not Execute (does not run arbitrary code—it sends a pre-formed message), and not merely Read (actively pushes data outward with side effects).
From the tool's definition Tool name 'pushplus_send_msg' and description '通过PushPlus(推送加)推送消息' (Send message through PushPlus) indicate the tool sends/delivers messages to a notification service.
Documented attack patterns abuse exactly the kind of access pushplus_send_msg gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Notify MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for pushplus_send_msg:
{
"version": "1",
"default": "deny",
"tools": {
"pushplus_send_msg": {
"limits": [
{
"counter": "pushplus_send_msg_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}pushplus_send_msg 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.
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通过PushPlus(推送加)推送消息. It is categorised as a Write tool in the Notify MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Notify MCP Server MCP server in PolicyLayer and add a rule for pushplus_send_msg: 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 Notify MCP Server. Nothing to install.
pushplus_send_msg is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the pushplus_send_msg 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.
Set action: deny in the PolicyLayer policy for pushplus_send_msg. 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.
pushplus_send_msg is provided by the Notify MCP Server MCP server (oci:ghcr.io/aahl/mcp-notify:latest). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Notify MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
21 Notify MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.