Search for messages containing specific text in a channel. Channel can be name or ID. For ambiguous names, use
AI agents call search_messages to retrieve information from Discord MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and retrieves message data from a channel based on search criteria. It has no side effects, cannot modify or delete data, and cannot execute code or trigger external operations. It is a straightforward Read category tool with low severity since search results are informational only and pose minimal risk of misuse by an AI agent.
From the tool's definition Tool performs 'Search for messages containing specific text in a channel' - a query operation that retrieves data without modifying, deleting, or executing actions. The description explicitly describes a search/retrieval function.
Attacks that exploit this kind of access
Search for messages containing specific text in a channel. Channel can be name or ID. For ambiguous names, use. It is categorised as a Read tool in the Discord MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Discord MCP Server MCP server in PolicyLayer and add a rule for search_messages: 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 MCP Server. Nothing to install.
search_messages 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 search_messages 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 search_messages. 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.
search_messages is provided by the Discord MCP Server MCP server (itzpingcat/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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