add-delete-bookmark · X MCP: Risk & Policy

WHAT IT DOES

What add-delete-bookmark does on X

AI agents use add-delete-bookmark to create or update resources in X — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your X environment.

WHY IT NEEDS A POLICY

Why add-delete-bookmark needs a policy

Bookmarking is a reversible user preference action that modifies data (bookmark list) but does not delete underlying content, execute external operations, or affect financial systems. This is a classic Write operation. Severity is low because the blast radius of accidental bookmarking/unbookmarking is minimal and limited to the authenticated user's preferences.

From the tool's definition Tool name 'add-delete-bookmark' and description 'Add or delete a bookmark for a specific tweet' indicate the tool creates or modifies bookmark state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add-delete-bookmark Rate-limited

add-delete-bookmark 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": {
    "add-delete-bookmark": {
      "limits": [
        {
          "counter": "add-delete-bookmark_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 X, so you can run agents against it safely.

FAQ

Questions about add-delete-bookmark

What does the add-delete-bookmark tool do? +

Add or delete a bookmark for a specific tweet. It is categorised as a Write tool in the X MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add-delete-bookmark? +

Register the X MCP server in PolicyLayer and add a rule for add-delete-bookmark: 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 X. Nothing to install.

What risk level is add-delete-bookmark? +

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

Can I rate-limit add-delete-bookmark? +

Yes. Add a rate_limit block to the add-delete-bookmark 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 add-delete-bookmark completely? +

Set action: deny in the PolicyLayer policy for add-delete-bookmark. 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 add-delete-bookmark? +

add-delete-bookmark is provided by the X MCP server (siddheshutd/x-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.