AI agents call discord_list_guild_members to retrieve information from Sage 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 displays information about Discord guild members. It has no side effects, does not modify data, and does not execute commands or trigger external operations beyond querying member information. The blast radius of misuse is limited to information disclosure of guild member lists, which is typically low-severity.
From the tool's definition Tool name 'discord_list_guild_members' and description 'List members of a guild' indicate a query operation that retrieves member data without modification. The verb 'list' and lack of any write/delete/execute language confirm this is a read-only operation.
Documented attack patterns abuse exactly the kind of access discord_list_guild_members gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sage MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for discord_list_guild_members:
{
"version": "1",
"default": "deny",
"tools": {
"discord_list_guild_members": {}
}
}discord_list_guild_members is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List members of a guild. It is categorised as a Read tool in the Sage MCP MCP Server, which means it retrieves data without modifying state.
Register the Sage MCP server in PolicyLayer and add a rule for discord_list_guild_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 Sage MCP. Nothing to install.
discord_list_guild_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_guild_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_guild_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_guild_members is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 359 Sage MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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359 Sage MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.