Quick search in priority mailboxes (Inbox, Sent) - limited scope for performance
AI agents call mail_search to retrieve information from MCP Apple Mail 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 email data from predefined mailboxes without creating, modifying, or deleting any content. It is a passive read operation with limited scope (only Inbox and Sent). The 'limited scope for performance' further confirms it is a constrained query function. No side effects are implied.
From the tool's definition Tool name 'mail_search' and description 'Quick search in priority mailboxes (Inbox, Sent)' indicate a search/retrieval operation with no modification or deletion capability.
Attacks that exploit this kind of access
Quick search in priority mailboxes (Inbox, Sent) - limited scope for performance. It is categorised as a Read tool in the MCP Apple Mail MCP Server, which means it retrieves data without modifying state.
Register the MCP Apple Mail MCP server in PolicyLayer and add a rule for mail_search: 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 MCP Apple Mail. Nothing to install.
mail_search 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 mail_search 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 mail_search. 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.
mail_search is provided by the MCP Apple Mail MCP server (lionsr/mcp-apple). 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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