channels_delete

Delete a channel (legacy undocumented).

SERVERSlack SOURCEkarbassi/slack-mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/karbassi-slack-mcp/channels-delete.md

WHAT IT DOES

What channels_delete does on Slack

AI agents call channels_delete to permanently remove resources in Slack, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why channels_delete is rated Critical

Deleting a channel is an irreversible destructive action that cannot be undone. It removes all messages, files, and metadata within that channel, affecting all users who depend on it. This is the most severe category applicable. Severity is 'high' rather than 'critical' because the blast radius is limited to a single workspace channel, though the impact on team collaboration can be significant.

From the tool's definition Tool name is 'channels_delete' and description states 'Delete a channel'; this irreversibly removes a Slack channel and all its associated data.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

channels_delete Hidden

channels_delete is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "channels_delete"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about channels_delete

What does the channels_delete tool do? +

Delete a channel (legacy undocumented). It is categorised as a Destructive tool in the Slack MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on channels_delete? +

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

channels_delete is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit channels_delete? +

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

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

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

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