AI agents call search_messages to retrieve information from Imessage without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing iMessage data without creating, modifying, deleting, or executing any side effects. It is a classic read operation (search/query) on a messaging database. The low severity reflects that while it accesses personal communication data, it cannot be misused to alter, delete, or act upon that data.
From the tool's definition Server is described as 'read-only' and tool 'search_messages' performs a search/query operation on iMessage data with no modification capability.
Attacks that exploit this kind of access
Search all iMessage chats for messages containing the query text. It is categorised as a Read tool in the Imessage MCP Server, which means it retrieves data without modifying state.
Register the Imessage 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 Imessage. 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 Imessage MCP server (jaredmoskowitz/imessage-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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