MCP Server Policy

SLACK MCP POLICY

Enforce policies on every tool call to the Slack MCP Server. 8 tools listed, categorised, and ready for rules.

modelcontextprotocol/server-slack 5 read 3 write 8 tools total
slack messaging channels team-communication

GET STARTED

Download this policy scaffold and add your rules. Intercept enforces them on every tool call before it reaches Slack.

terminal

# Download policy scaffold

curl -o slack.yaml https://raw.githubusercontent.com/policylayer/intercept/main/policies/slack.yaml

# Run with Intercept

intercept --policy slack.yaml -- npx -y @modelcontextprotocol/server-slack

Server documentation: https://github.com/modelcontextprotocol/servers/tree/main/src/slack

READ TOOLS

5

WRITE TOOLS

2

slack_post_message

slack_post_message Post a new message to a Slack channel

OTHER TOOLS

1

POLICY YAML

This scaffold lists every tool with empty rules. Add conditions — rate limits, argument validation, deny rules — then deploy with Intercept.

slack.yaml 
version: "1"
description: "Policy for modelcontextprotocol/server-slack"
default: "allow"
tools:
    slack_get_channel_history:
        rules: []
    slack_get_thread_replies:
        rules: []
    slack_get_user_profile:
        rules: []
    slack_get_users:
        rules: []
    slack_list_channels:
        rules: []
    slack_add_reaction:
        rules: []
    slack_post_message:
        rules: []
    slack_reply_to_thread:
        rules: []

RELATED POLICIES

Resend 42 tools
messaging
Google Workspace Chat (gws CLI) 37 tools
messaging
Twilio 36 tools
messaging
Telegram 3 tools
messaging

FREQUENTLY ASKED QUESTIONS

What tools does the Slack MCP server expose?

The Slack MCP Server exposes 8 tools across 3 categories: Read, Write, Other. Each tool can be individually controlled with Intercept policies.

How do I enforce policies on Slack?

Download the policy scaffold, add rules (rate limits, argument validation, deny rules), then run Intercept as a proxy in front of the Slack MCP server. Every tool call is evaluated against your YAML policy before execution.

Is the Slack policy free to use?

Yes. All Intercept policies are open source under the Apache 2.0 licence. Download, modify, and deploy without restrictions.

ENFORCE POLICIES ON SLACK

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Browse all policies →