AI agents call backup_chats to retrieve information from Telegram MCP Complete without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Backing up chat records is a read/export operation — it retrieves and copies data without modifying or deleting it. However, it has medium severity because it exports potentially sensitive private conversations across all chats, representing a significant privacy risk if misused by an AI agent.
From the tool's definition 备份所有聊天记录 (backup all chat records)
Documented attack patterns abuse exactly the kind of access backup_chats 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 backup_chats:
{
"version": "1",
"default": "deny",
"tools": {
"backup_chats": {}
}
}backup_chats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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备份所有聊天记录. It is categorised as a Read tool in the Telegram MCP Complete MCP Server, which means it retrieves data without modifying state.
Register the Telegram MCP Complete MCP server in PolicyLayer and add a rule for backup_chats: 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.
backup_chats is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the backup_chats 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 backup_chats. 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.
backup_chats 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.
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153 Telegram MCP Complete tools catalogued and risk-classified — across an index of 43,000+ MCP servers.