update-user-data

Updates an existing user data record

SERVERMcp Dev SOURCE@umbraco-cms/mcp-dev

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-dev/update-user-data.md

WHAT IT DOES

What update-user-data does on Mcp Dev

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

RISK

Why update-user-data is rated Medium

The tool creates or modifies data in a reversible manner (user records can be edited, corrected, or reverted). It does not permanently delete data (would be Destructive), execute arbitrary code (would be Execute), or involve financial transactions (would be Financial).

From the tool's definition Tool name is 'update-user-data' and description states 'Updates an existing user data record' — this modifies existing user data reversibly within the Umbraco CMS system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update-user-data safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Dev, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update-user-data, this is the rule to start with:

update-user-data Rate-limited

update-user-data 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": {
    "update-user-data": {
      "limits": [
        {
          "counter": "update-user-data_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Dev, apply this rule, and every update-user-data call is checked against it from then on.

FAQ

Questions about update-user-data

What does the update-user-data tool do? +

Updates an existing user data record. It is categorised as a Write tool in the Mcp Dev MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update-user-data? +

Register the Mcp Dev MCP server in PolicyLayer and add a rule for update-user-data: 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 Mcp Dev. Nothing to install.

What risk level is update-user-data? +

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

Can I rate-limit update-user-data? +

Yes. Add a rate_limit block to the update-user-data 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 update-user-data completely? +

Set action: deny in the PolicyLayer policy for update-user-data. 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 update-user-data? +

update-user-data is provided by the Mcp Dev MCP server (@umbraco-cms/mcp-dev). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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