List all channels in the connected Slack workspace. WARNING: channel_name filter only applies to the current page. For workspaces with 100+ channels, use list_slack_channels with limit=1000 and paginate via cursor, OR pass #channel-name directly to get_slack_channel_history (which auto-paginates ...
AI agents call list_slack_channels to retrieve information from Apple Shortcuts without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that queries Slack workspace data and returns a list of channels. It has no capability to create, modify, delete, or execute any actions. The warning about pagination parameters is operational guidance with no bearing on the risk category. Read operations generally carry low severity since they only expose existing data without side effects.
From the tool's definition Tool description: 'List all channels in the connected Slack workspace.' The tool retrieves and queries channel information with no modification or side effects.
Documented attack patterns abuse exactly the kind of access list_slack_channels gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apple Shortcuts, and nothing reaches the server without passing your rules. This is the rule we recommend for list_slack_channels:
{
"version": "1",
"default": "deny",
"tools": {
"list_slack_channels": {}
}
}list_slack_channels is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all channels in the connected Slack workspace. WARNING: channel_name filter only applies to the current page. For workspaces with 100+ channels, use list_slack_channels with limit=1000 and paginate via cursor, OR pass #channel-name directly to get_slack_channel_history (which auto-paginates the lookup). It is categorised as a Read tool in the Apple Shortcuts MCP Server, which means it retrieves data without modifying state.
Register the Apple Shortcuts MCP server in PolicyLayer and add a rule for list_slack_channels: 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 Apple Shortcuts. Nothing to install.
list_slack_channels is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_slack_channels 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.
Set action: deny in the PolicyLayer policy for list_slack_channels. 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.
list_slack_channels is provided by the Apple Shortcuts MCP server (@mindstone/mcp-server-apple-shortcuts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Apple Shortcuts, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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423 Apple Shortcuts tools catalogued and risk-classified — across an index of 43,000+ MCP servers.