AI agents use refresh_qr_code to create or update resources in Telegram MCP Complete — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Telegram MCP Complete environment.
This tool regenerates/refreshes a QR code and creates a new login link for an account. It modifies authentication state by invalidating the old QR code and generating a new one — a reversible write operation. Misuse could facilitate unauthorized account access attempts, hence medium severity.
From the tool's definition 刷新指定账号的二维码，生成新的登录链接 (Refresh the QR code for a specified account, generating a new login link)
Documented attack patterns abuse exactly the kind of access refresh_qr_code gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Telegram MCP Complete, and nothing reaches the server without passing your rules. This is the rule we recommend for refresh_qr_code:
{
"version": "1",
"default": "deny",
"tools": {
"refresh_qr_code": {
"limits": [
{
"counter": "refresh_qr_code_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}refresh_qr_code 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.
Free to start. No card required.
刷新指定账号的二维码，生成新的登录链接. It is categorised as a Write tool in the Telegram MCP Complete MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Telegram MCP Complete MCP server in PolicyLayer and add a rule for refresh_qr_code: 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 Telegram MCP Complete. Nothing to install.
refresh_qr_code 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 refresh_qr_code 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 refresh_qr_code. 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.
refresh_qr_code is provided by the Telegram MCP Complete MCP server (you922/telegram-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Telegram MCP Complete, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
153 Telegram MCP Complete tools catalogued and risk-classified — across an index of 43,000+ MCP servers.