AI agents use advanced-tweet 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.
This tool creates new data (tweets) on a social media platform, which is a reversible write operation. While tweets can be deleted, the primary action is content creation, not destruction. Severity is medium because misuse could result in unauthorized posting, spam, or impersonation, but the blast radius is limited to the user's social media account and the content itself can be removed.
From the tool's definition Tool description states it can "Post a tweet" and create tweets with advanced options like replies, quotes, and polls. These are all write operations that create new content.
Attacks that exploit this kind of access
Post a tweet with advanced options like reply to a tweet, quote a specific tweet, or create a poll for the 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.
Register the X MCP server in PolicyLayer and add a rule for advanced-tweet: 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.
advanced-tweet 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 advanced-tweet 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 advanced-tweet. 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.
advanced-tweet 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.
advanced-tweet is one line of X's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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