// MCP TOOL REFERENCE

SLACK USER MCP SERVER TOOLS

8 tools from the Slack User MCP Server MCP Server, categorised by risk level.

READ TOOLS

slack_get_channel_history Get recent messages from a channel slack_get_thread_replies Get all replies in a message thread slack_get_user_profile Get detailed profile information for a specific user slack_get_users Get a list of all users in the workspace with their basic profile information 2/5 slack_list_channels List public channels in the workspace with pagination slack_reply_to_thread Reply to a specific message thread in Slack

WRITE TOOLS

slack_add_reaction Add a reaction emoji to a message 2/5 slack_post_message Post a new message to a Slack channel 2/5

// FAQ

How many tools does the Slack User MCP Server MCP server have? +

The Slack User MCP Server MCP server exposes 8 tools across 2 categories: Read, Write.

How do I enforce policies on Slack User MCP Server tools? +

Use Intercept, the open-source MCP proxy. Write YAML rules for each tool — rate limits, argument validation, or deny rules — then run Intercept in front of the Slack User MCP Server server.

What risk categories do Slack User MCP Server tools fall into? +

Slack User MCP Server tools are categorised as Read (6), Write (2). Each category has a recommended default policy.

Enforce policies on Slack User MCP Server

Open source. One binary. Zero dependencies.

npx -y @policylayer/intercept

github.com/policylayer/intercept →