conversations_external_invite_permissions_set

A write tool on the Slack MCP server.

SERVERSlack SOURCEkarbassi/slack-mcp

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/karbassi-slack-mcp/conversations-external-invite-permissions-set.md

WHAT IT DOES

What conversations_external_invite_permissions_set does on Slack

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

RISK

Why conversations_external_invite_permissions_set is rated Medium

This tool modifies access control settings (permissions) for external invitations to conversations, which is a reversible but impactful change. It affects who can be invited to channels externally. While not destructive or financial, misconfiguration could expose channels to unauthorized external users or lock out legitimate invitations.

From the tool's definition Tool name 'conversations_external_invite_permissions_set' indicates modification of permissions for external invitations to conversations/channels. The 'set' verb signals a write/update action.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs conversations_external_invite_permissions_set safely

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

conversations_external_invite_permissions_set Rate-limited

conversations_external_invite_permissions_set 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": {
    "conversations_external_invite_permissions_set": {
      "limits": [
        {
          "counter": "conversations_external_invite_permissions_set_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 Slack, apply this rule, and every conversations_external_invite_permissions_set call is checked against it from then on.

FAQ

Questions about conversations_external_invite_permissions_set

What does the conversations_external_invite_permissions_set tool do? +

conversations_external_invite_permissions_set is a write tool on the Slack MCP server. It is categorised as a Write tool in the Slack MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on conversations_external_invite_permissions_set? +

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

What risk level is conversations_external_invite_permissions_set? +

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

Can I rate-limit conversations_external_invite_permissions_set? +

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

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

conversations_external_invite_permissions_set is provided by the Slack MCP server (karbassi/slack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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