Medium Risk

link_telegram_group

Generate a deep link URL for adding the PingZen bot to a Telegram group. Open the URL in Telegram to select a group. The link expires in 1 hour. After linking, the group's chat_id can be used as a target for Telegram alerts. Returns: Deep link URL, workspace name, expiry info.

Part of the PingZen Uptime Monitoring server.

link_telegram_group can modify PingZen Uptime Monitoring data, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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AI agents use link_telegram_group to create or modify resources in PingZen Uptime Monitoring. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call link_telegram_group repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach PingZen Uptime Monitoring.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "link_telegram_group": {
      "limits": [
        {
          "counter": "link_telegram_group_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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These attack patterns abuse exactly the kind of access link_telegram_group gives an agent. Each links to the full case and the policy that stops it:

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Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so link_telegram_group only ever does what you allow.

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Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.

What does the link_telegram_group tool do? +

Generate a deep link URL for adding the PingZen bot to a Telegram group. Open the URL in Telegram to select a group. The link expires in 1 hour. After linking, the group's chat_id can be used as a target for Telegram alerts. Returns: Deep link URL, workspace name, expiry info.. It is categorised as a Write tool in the PingZen Uptime Monitoring MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on link_telegram_group? +

Register the PingZen Uptime Monitoring MCP server in PolicyLayer and add a rule for link_telegram_group: 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 PingZen Uptime Monitoring. Nothing to install.

What risk level is link_telegram_group? +

link_telegram_group is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit link_telegram_group? +

Yes. Add a rate_limit block to the link_telegram_group 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.

How do I block link_telegram_group completely? +

Set action: deny in the PolicyLayer policy for link_telegram_group. 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.

What MCP server provides link_telegram_group? +

link_telegram_group is provided by the PingZen Uptime Monitoring MCP server (pingzen/uptime-monitoring). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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