slack_get_thread_replies

Get all replies in a message thread

SERVERSlack SOURCE@modelcontextprotocol/server-slack

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/slack/slack-get-thread-replies.md

WHAT IT DOES

What slack_get_thread_replies does on Slack

AI agents call slack_get_thread_replies to retrieve information from Slack without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why slack_get_thread_replies is rated Low

This tool retrieves data from Slack (thread replies) in a read-only manner with no destructive, state-changing, or external execution side effects. The action is purely informational retrieval, placing it firmly in the Read category. Severity is low given the data sensitivity is context-dependent and typical of internal communication retrieval.

From the tool's definition "Get all replies in a message thread" - retrieves thread replies without modification or side effects

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs slack_get_thread_replies 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 slack_get_thread_replies, this is the rule to start with:

slack_get_thread_replies Allowed

slack_get_thread_replies is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "slack_get_thread_replies": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Slack, apply this rule, and every slack_get_thread_replies call is checked against it from then on.

FAQ

Questions about slack_get_thread_replies

What does the slack_get_thread_replies tool do? +

Get all replies in a message thread. It is categorised as a Read tool in the Slack MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on slack_get_thread_replies? +

Register the Slack MCP server in PolicyLayer and add a rule for slack_get_thread_replies: 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 slack_get_thread_replies? +

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

Can I rate-limit slack_get_thread_replies? +

Yes. Add a rate_limit block to the slack_get_thread_replies 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_get_thread_replies completely? +

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

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

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