Retrieve a specific email message by UID. Auto-connects if not already connected.
AI agents call get_message to retrieve information from Mcp Mail Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves email data without side effects. However, severity is elevated to 'medium' rather than 'low' because email often contains sensitive personal or business information (passwords, financial details, private communications), so unauthorized retrieval poses meaningful privacy/security risk. The 'auto-connects' capability adds minor automation risk but does not change the fundamental read-only nature.
From the tool's definition Tool name is 'get_message' and description states 'Retrieve a specific email message by UID', which is a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
Retrieve a specific email message by UID. Auto-connects if not already connected. It is categorised as a Read tool in the Mcp Mail Server MCP Server, which means it retrieves data without modifying state.
Register the Mcp Mail Server MCP server in PolicyLayer and add a rule for get_message: 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 Mail Server. Nothing to install.
get_message 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 get_message 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 get_message. 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.
get_message is provided by the Mcp Mail Server MCP server (mcp-mail-server). 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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