Check for recent messages that mention the bot.
AI agents call discord_check_mentions to retrieve information from Discord Bridge MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries recent mention data from Discord with no side effects. It is a read-only operation analogous to searching or fetching data. The low severity reflects minimal blast radius—even if misused, it only surfaces existing public or semi-public messages that already mention the bot, causing no data loss or external actions.
From the tool's definition Tool name 'discord_check_mentions' and description 'Check for recent messages that mention the bot' indicate a query operation that retrieves message history without modifying state.
Attacks that exploit this kind of access
Check for recent messages that mention the bot. It is categorised as a Read tool in the Discord Bridge MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Discord Bridge MCP Server MCP server in PolicyLayer and add a rule for discord_check_mentions: 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 Bridge MCP Server. Nothing to install.
discord_check_mentions 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_check_mentions 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_check_mentions. 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_check_mentions is provided by the Discord Bridge MCP Server MCP server (jhammant/mcp-discord-bridge). 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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