pin_post · SergeyKrin9/mcp Servers MCP: Risk & Policy

WHAT IT DOES

What pin_post does on SergeyKrin9/mcp Servers

AI agents use pin_post to create or update resources in SergeyKrin9/mcp Servers — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SergeyKrin9/mcp Servers environment.

WHY IT NEEDS A POLICY

Why pin_post needs a policy

This tool modifies the state of a post (pinning it) without destroying data, making it a Write operation. Severity is medium because pinning a post can amplify visibility of content to many channel members, potentially spreading misinformation or unwanted messaging if misused by an AI agent, but the action is reversible (the post can be unpinned).

From the tool's definition Tool name 'pin_post' and description 'Pin a Telegram post in the channel' indicate a modification of channel content status.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pin_post Rate-limited

pin_post 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_post": {
      "limits": [
        {
          "counter": "pin_post_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 SergeyKrin9/mcp Servers, so you can run agents against it safely.

FAQ

Questions about pin_post

What does the pin_post tool do? +

Pin a Telegram post in the channel. It is categorised as a Write tool in the SergeyKrin9/mcp Servers 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_post? +

Register the SergeyKrin9/mcp Servers MCP server in PolicyLayer and add a rule for pin_post: 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 SergeyKrin9/mcp Servers. Nothing to install.

What risk level is pin_post? +

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

Can I rate-limit pin_post? +

Yes. Add a rate_limit block to the pin_post 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_post completely? +

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

pin_post is provided by the SergeyKrin9/mcp Servers MCP server (sergeykrin9/mcp-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.