AI agents call get_guild 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 information about a Discord guild without creating, modifying, or deleting any data. The verb 'Get' and the read-only nature of the operation place it squarely in the Read category. Severity is low because retrieving guild metadata poses minimal risk; the data is not sensitive system operations, and the bot must already be a member of the guild to access it.
From the tool's definition Tool name is 'get_guild' and description states 'Get a guild by id' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get a guild by id. The bot must be a member of that guild. 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 get_guild: 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.
get_guild 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 get_guild 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 get_guild. 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.
get_guild is provided by the Discord MCP server (taka392/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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