AI agents call list_folders to retrieve information from Telegram without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and returns information about existing chat folders. It has no side effects, cannot modify or delete data, and does not execute external operations. It is clearly a Read category tool with low severity since listing folders poses minimal risk even if an AI agent calls it without authorization.
From the tool's definition Tool name 'list_folders' and description 'List all chat folders' indicate a query operation that retrieves folder metadata without modifying or deleting data.
Attacks that exploit this kind of access
List all chat folders. It is categorised as a Read tool in the Telegram MCP Server, which means it retrieves data without modifying state.
Register the Telegram MCP server in PolicyLayer and add a rule for list_folders: 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. Nothing to install.
list_folders 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 list_folders 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 list_folders. 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.
list_folders is provided by the Telegram MCP server (vovavindar/telegram-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →