slack_post_message

Post a message to a Slack channel

SERVERScopeGate SOURCEhttps://mcp.scopegate.cloud/{api_key}

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/io-github-alifanov-scopegate/slack-post-message.md

WHAT IT DOES

What slack_post_message does on ScopeGate

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

RISK

Why slack_post_message is rated Medium

This tool creates/posts data (a Slack message) which is reversible—messages can be edited or deleted. It does not execute arbitrary code, delete data irreversibly, or move money. The 'Post' verb and description clearly indicate a Write action. Severity is medium because misuse could spam channels, post sensitive information, or disrupt communication, but effects are generally containable and reversible.

From the tool's definition Tool name 'slack_post_message' and description 'Post a message to a Slack channel' indicate creation of new data (a message) in a communication channel.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs slack_post_message safely

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

slack_post_message Rate-limited

slack_post_message 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": {
    "slack_post_message": {
      "limits": [
        {
          "counter": "slack_post_message_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 ScopeGate, apply this rule, and every slack_post_message call is checked against it from then on.

FAQ

Questions about slack_post_message

What does the slack_post_message tool do? +

Post a message to a Slack channel. It is categorised as a Write tool in the ScopeGate MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on slack_post_message? +

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

What risk level is slack_post_message? +

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

Can I rate-limit slack_post_message? +

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

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

slack_post_message is provided by the ScopeGate MCP server (https://mcp.scopegate.cloud/{api_key}). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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