AI agents call discord_list_guilds 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 is a straightforward information retrieval operation with no capability to modify, delete, or execute actions. It simply enumerates guilds the bot has access to. Low severity because the information returned (guild IDs, names, member counts, icons) is generally not sensitive in the context of a bot's own membership, and listing available resources is a foundational, non-destructive operation.
From the tool's definition Tool description explicitly states 'Read-only' and 'List every Discord server'; retrieves guild metadata (id, name, member count, icon) with no side effects. Takes no arguments and is intended as discovery for other operations.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List every Discord server (guild) the bot is a member of (id, name, member count, icon). Takes no arguments. Read-only. Start here to discover the guild_id needed by most other tools. 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_guilds: 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_guilds 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_guilds 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_guilds. 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_guilds 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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