amplitude_set_user_properties

THE RISK

Medium Risk

Why amplitude_set_user_properties needs a policy

The tool creates or modifies user data reversibly (update user properties), fitting the Write category. Severity is medium because while it modifies user data, it does not delete information (Destructive), move money (Financial), or execute arbitrary code (Execute). The modification is reversible and limited to user properties within an analytics context.

From the tool's definition Tool description states 'Update a user', which is a write operation that modifies user properties in Amplitude. This aligns with the broader server purpose of tracking and updating user data in analytics.

Documented attack patterns abuse exactly the kind of access amplitude_set_user_properties gives an agent:

POLICY

How to control amplitude_set_user_properties

PolicyLayer is an MCP gateway — it sits between your AI agents and Amplitude MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for amplitude_set_user_properties:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "amplitude_set_user_properties": {
      "limits": [
        {
          "counter": "amplitude_set_user_properties_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

amplitude_set_user_properties 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.

Create a free account and register Amplitude MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Amplitude MCP Server tools

Financial amplitude_track_revenue Track a revenue event in Amplitude Write amplitude_track_pageview Track a page view event in Amplitude Write amplitude_track_event Track a custom event in Amplitude Write amplitude_track_signup Track a signup event and create a user profile in Amplitude

All 5 Amplitude MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about amplitude_set_user_properties

What does the amplitude_set_user_properties tool do? +

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

How do I enforce a policy on amplitude_set_user_properties? +

Register the Amplitude MCP Server MCP server in PolicyLayer and add a rule for amplitude_set_user_properties: 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 Amplitude MCP Server. Nothing to install.

What risk level is amplitude_set_user_properties? +

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

Can I rate-limit amplitude_set_user_properties? +

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

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

amplitude_set_user_properties is provided by the Amplitude MCP Server MCP server (moonbirdai/amplitude-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Amplitude MCP Server tool call.

Start from Amplitude MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →