AI agents call discord_list_members to retrieve information from Discord without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves member information from a Discord server without modifying any data or triggering external actions. It performs a simple enumeration/query operation that returns member roles and IDs. Even though Discord servers can contain sensitive member information, the tool itself is read-only and represents no capability for misuse beyond information disclosure—which is characteristic of the Read category.
From the tool's definition Tool name 'discord_list_members' and description explicitly states it 'List members of a server' and 'Returns { members: [...], nextCursor }'.
Attacks that exploit this kind of access
List members of a server with their roles, ordered by user ID. Returns { members: [...], nextCursor }. A page holds up to 1000 members; if nextCursor is non-null, pass it back as. It is categorised as a Read tool in the Discord MCP Server, which means it retrieves data without modifying state.
Register the Discord MCP server in PolicyLayer and add a rule for discord_list_members: 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 Discord. Nothing to install.
discord_list_members 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 discord_list_members 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 discord_list_members. 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.
discord_list_members is provided by the Discord MCP server (@pasympa/discord-mcp). 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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