List public or pre-defined channels in the workspace with pagination
AI agents call slack_list_channels to retrieve information from Helm Chart CLI 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 by listing existing Slack channels. It has no side effects, does not modify or delete data, and does not execute code or trigger external operations. The pagination capability is a standard retrieval pattern. The blast radius of misuse is minimal—an agent could enumerate channels but cannot alter workspace configuration or access sensitive data beyond what's publicly visible.
From the tool's definition Tool name 'slack_list_channels' and description 'List public or pre-defined channels in the workspace with pagination' indicate a query operation that retrieves channel information without modifying any data.
Attacks that exploit this kind of access
List public or pre-defined channels in the workspace with pagination. It is categorised as a Read tool in the Helm Chart CLI MCP Server, which means it retrieves data without modifying state.
Register the Helm Chart CLI 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 Helm Chart CLI. 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 Helm Chart CLI MCP server (jeff-nasseri/servers). 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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