createUsersBookmark · Xdevplatform/x MCP: Risk & Policy

WHAT IT DOES

What createUsersBookmark does on Xdevplatform/xmcp

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

WHY IT NEEDS A POLICY

Why createUsersBookmark needs a policy

This tool creates a new bookmark entry for an authenticated user, which is a reversible data modification operation. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), involve financial transactions (would be Financial), or merely read data (would be Read). The blast radius is limited to the authenticated user's bookmark collection, warranting medium severity rather than high.

From the tool's definition Tool name 'createUsersBookmark' and description 'Add a post to the authenticated user bookmarks' indicate creation/modification of user data (bookmarks list).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createUsersBookmark Rate-limited

createUsersBookmark 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": {
    "createUsersBookmark": {
      "limits": [
        {
          "counter": "createusersbookmark_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 Xdevplatform/xmcp, so you can run agents against it safely.

FAQ

Questions about createUsersBookmark

What does the createUsersBookmark tool do? +

Add a post to the authenticated user bookmarks. It is categorised as a Write tool in the Xdevplatform/xmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on createUsersBookmark? +

Register the Xdevplatform/x MCP server in PolicyLayer and add a rule for createUsersBookmark: 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 Xdevplatform/xmcp. Nothing to install.

What risk level is createUsersBookmark? +

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

Can I rate-limit createUsersBookmark? +

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

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

createUsersBookmark is provided by the Xdevplatform/x MCP server (xdevplatform/xmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.