reminders_delete

Delete a reminder.

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/reminders-delete.md

WHAT IT DOES

What reminders_delete does on Slack

AI agents call reminders_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 reminders_delete is rated Critical

Deletion operations are classified as Destructive because they irreversibly remove data. A reminder deletion cannot be recovered without additional backup systems. While the blast radius is limited to a single reminder (not system-critical), the irreversible nature and potential to disrupt user workflows justifies 'high' severity.

From the tool's definition Tool name is 'reminders_delete' and description states 'Delete a reminder.' The verb 'delete' combined with the irreversible nature of deletion indicates this is a destructive action that cannot be undone.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

reminders_delete Hidden

reminders_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": [
    "reminders_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 reminders_delete call is checked against it from then on.

FAQ

Questions about reminders_delete

What does the reminders_delete tool do? +

Delete a reminder. 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 reminders_delete? +

Register the Slack MCP server in PolicyLayer and add a rule for reminders_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 reminders_delete? +

reminders_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 reminders_delete? +

Yes. Add a rate_limit block to the reminders_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 reminders_delete completely? +

Set action: deny in the PolicyLayer policy for reminders_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 reminders_delete? +

reminders_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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