pin_forum_topic · Claudegram MCP: Risk & Policy

WHAT IT DOES

What pin_forum_topic does on Claudegram

AI agents use pin_forum_topic to create or update resources in Claudegram — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Claudegram environment.

WHY IT NEEDS A POLICY

Why pin_forum_topic needs a policy

Pinning and unpinning forum topics modifies the organization and presentation of a Telegram forum by changing which topics appear in the header. This is a Write operation because it creates or modifies data (topic pin state) reversibly—the action can be undone by unpinning.

From the tool's definition Tool name 'pin_forum_topic' and description 'Закрепить/открепить тему в шапке' (Pin/unpin topic in header) indicates modification of forum topic visibility state. This is a reversible change to chat/forum structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pin_forum_topic Rate-limited

pin_forum_topic 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pin_forum_topic": {
      "limits": [
        {
          "counter": "pin_forum_topic_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Claudegram, so you can run agents against it safely.

FAQ

Questions about pin_forum_topic

What does the pin_forum_topic tool do? +

Закрепить/открепить тему в шапке. It is categorised as a Write tool in the Claudegram MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pin_forum_topic? +

Register the Claudegram MCP server in PolicyLayer and add a rule for pin_forum_topic: 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 Claudegram. Nothing to install.

What risk level is pin_forum_topic? +

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

Can I rate-limit pin_forum_topic? +

Yes. Add a rate_limit block to the pin_forum_topic 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 pin_forum_topic completely? +

Set action: deny in the PolicyLayer policy for pin_forum_topic. 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 pin_forum_topic? +

pin_forum_topic is provided by the Claudegram MCP server (sanjar-x/claudegram). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.