List public channels in the workspace with pagination
AI agents call slack_list_channels to retrieve information from Simple Slack without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries channel metadata from Slack. It performs no data modification, deletion, or execution of external operations. The pagination feature further confirms it is a standard read/query operation. The blast radius of misuse is minimal—an AI agent could only enumerate channels, which is non-sensitive metadata that users typically see in their Slack workspace UI.
From the tool's definition Tool name 'slack_list_channels' and description 'List public channels in the workspace with pagination' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List public channels in the workspace with pagination. It is categorised as a Read tool in the Simple Slack MCP Server, which means it retrieves data without modifying state.
Register the Simple Slack MCP server in PolicyLayer and add a rule for slack_list_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 Simple Slack. Nothing to install.
slack_list_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 slack_list_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 slack_list_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.
slack_list_channels is provided by the Simple Slack MCP server (bugzy-ai/slack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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