Set Telegram Business greeting message — auto-reply sent to new conversations using a quick reply shortcut as template. Requires Telegram Business subscription. Pass clear=true to disable.
AI agents use telegram-set-business-greeting to create or update resources in MCP-Telegram — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP-Telegram environment.
This tool modifies user-facing messaging behavior by creating or updating an auto-reply greeting. While it operates on the user's account without explicit destructive intent, it can affect how the account communicates with others.
From the tool's definition Sets a greeting message on Telegram Business account — creates or modifies data (the auto-reply greeting). Description explicitly states 'Set' and 'auto-reply sent to new conversations', indicating message creation/modification.
Documented attack patterns abuse exactly the kind of access telegram-set-business-greeting gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP-Telegram, and nothing reaches the server without passing your rules. This is the rule we recommend for telegram-set-business-greeting:
{
"version": "1",
"default": "deny",
"tools": {
"telegram-set-business-greeting": {
"limits": [
{
"counter": "telegram-set-business-greeting_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}telegram-set-business-greeting 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.
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Set Telegram Business greeting message — auto-reply sent to new conversations using a quick reply shortcut as template. Requires Telegram Business subscription. Pass clear=true to disable. It is categorised as a Write tool in the MCP-Telegram MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP-Telegram MCP server in PolicyLayer and add a rule for telegram-set-business-greeting: 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 MCP-Telegram. Nothing to install.
telegram-set-business-greeting 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 telegram-set-business-greeting 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 telegram-set-business-greeting. 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.
telegram-set-business-greeting is provided by the MCP-Telegram MCP server (mcp-telegram/mcp-telegram). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP-Telegram, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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181 MCP-Telegram tools catalogued and risk-classified — across an index of 43,000+ MCP servers.