lemmy_follow_community

Subscribe to a community (local or federated). Accepts numeric community ID or

SERVERCrow SOURCEkh0pper/crow

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/lemmy-follow-community.md

WHAT IT DOES

What lemmy_follow_community does on Crow

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

RISK

Why lemmy_follow_community is rated Medium

Following/subscribing to a community is a reversible write action that creates a subscription relationship. It does not delete data, execute code, or involve financial transactions. Misuse could result in unwanted subscriptions across federated platforms, but the action is reversible.

From the tool's definition Subscribe to a community (local or federated)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs lemmy_follow_community safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Crow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For lemmy_follow_community, this is the rule to start with:

lemmy_follow_community Rate-limited

lemmy_follow_community 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": {
    "lemmy_follow_community": {
      "limits": [
        {
          "counter": "lemmy_follow_community_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Crow, apply this rule, and every lemmy_follow_community call is checked against it from then on.

FAQ

Questions about lemmy_follow_community

What does the lemmy_follow_community tool do? +

Subscribe to a community (local or federated). Accepts numeric community ID or. It is categorised as a Write tool in the Crow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on lemmy_follow_community? +

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

What risk level is lemmy_follow_community? +

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

Can I rate-limit lemmy_follow_community? +

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

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

lemmy_follow_community is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Crow, and thousands of servers like it.

This server

All 587 Crow tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →