MCP Tool Reference Low Risk

slack_reply_to_thread

Reply to a specific message thread

Part of the Slack MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

modelcontextprotocol/server-slack Other

WHEN AI AGENTS USE THIS TOOL

AI agents call slack_reply_to_thread to perform operations in Slack. While the risk category is not fully classified, applying a rate limit gives you visibility into how often the tool is called and prevents unexpected bursts of activity from autonomous agents.

WHY ENFORCE A POLICY ON SLACK_REPLY_TO_THREAD

Applying a policy to slack_reply_to_thread gives you an audit trail of every call an AI agent makes. Even for low-risk tools, visibility into agent behaviour helps you debug issues, optimise workflows, and maintain compliance with your organisation's security requirements.

RECOMMENDED POLICY

Apply a rate limit to control usage and monitor for unexpected behaviour.

slack.yaml 
tools:
  slack_reply_to_thread:
    rules:
      - action: allow
        rate_limit:
          max: 60
          window: 60

See the full Slack policy for all 8 tools.

DETAILS

Tool Name

slack_reply_to_thread

Category

Other

MCP Server

Slack MCP Server

Risk Level

Low

MORE SLACK TOOLS

slack_get_channel_history Read
Get recent messages from a channel
slack_get_thread_replies Read
Get all replies in a message thread
slack_get_user_profile Read
Get detailed profile information for a specific user
slack_get_users Read
Get list of workspace users with basic profile information
slack_list_channels Read
List public or pre-defined channels in the workspace
slack_add_reaction Write
Add an emoji reaction to a message
slack_post_message Write
Post a new message to a Slack channel

SIMILAR OTHER TOOLS ON OTHER SERVERS

analytics Algolia
Access Algolia analytics data
monitoring Algolia
Monitor Algolia service status
recommend Algolia
Access Algolia recommendation features
abtesting Algolia
Manage A/B tests
collections Algolia
Manage query suggestions collections
usage Algolia
Access Algolia usage data

RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the slack_reply_to_thread tool do?

Reply to a specific message thread. It is categorised as a Other tool in the Slack MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on slack_reply_to_thread?

Add a rule in your Intercept YAML policy under the tools section for slack_reply_to_thread. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Slack MCP server.

What risk level is slack_reply_to_thread?

slack_reply_to_thread is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit slack_reply_to_thread?

Yes. Add a rate_limit block to the slack_reply_to_thread rule in your Intercept 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_reply_to_thread completely?

Set action: deny in the Intercept policy for slack_reply_to_thread. 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_reply_to_thread?

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

ENFORCE POLICIES ON SLACK

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Full Slack policy →