List all public chat channels visible to the current user. Returns channel information including title, description, and member counts. Supports filtering and pagination.
AI agents call discourse_list_chat_channels to retrieve information from Discourse MCP 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 chat channel metadata (title, description, member counts) with no side effects. It performs a safe information lookup operation characteristic of Read category tools. The low severity reflects that listing publicly visible channels poses minimal risk—an agent cannot modify data, execute commands, or cause harm through this query.
From the tool's definition Tool name contains 'list' and description states it 'List all public chat channels' and 'Returns channel information' without any modification, deletion, or execution capabilities. The operation is read-only with support only for 'filtering and pagination'.
Attacks that exploit this kind of access
List all public chat channels visible to the current user. Returns channel information including title, description, and member counts. Supports filtering and pagination. It is categorised as a Read tool in the Discourse MCP MCP Server, which means it retrieves data without modifying state.
Register the Discourse MCP server in PolicyLayer and add a rule for discourse_list_chat_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 Discourse MCP. Nothing to install.
discourse_list_chat_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 discourse_list_chat_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 discourse_list_chat_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.
discourse_list_chat_channels is provided by the Discourse MCP server (king-of-the-grackles/discourse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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