Check inbox via specified email service.
AI agents call check_inbox to retrieve information from MiniMail MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves email data from an inbox, which is a standard Read operation. There are no side effects, data modifications, deletions, or external state changes. The blast radius of misuse is minimal—an attacker gaining access could read emails an authorized user can access, but cannot modify, delete, or send messages.
From the tool's definition Tool name 'check_inbox' and description 'Check inbox via specified email service' indicate a read-only operation that retrieves email messages without modification.
Attacks that exploit this kind of access
Check inbox via specified email service. It is categorised as a Read tool in the MiniMail MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MiniMail MCP Server MCP server in PolicyLayer and add a rule for check_inbox: 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 MiniMail MCP Server. Nothing to install.
check_inbox 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 check_inbox 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 check_inbox. 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.
check_inbox is provided by the MiniMail MCP Server MCP server (sandraschi/email-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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