List messages in the current inbox.
AI agents call get_inbox to retrieve information from Mail Tm 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 messages from an inbox without modifying, deleting, or executing any operations. It is a straightforward read operation. While it accesses email content (potentially sensitive), the scope is limited to the user's own temporary inbox, and the risk of misuse by an AI agent is minimal.
From the tool's definition Tool name 'get_inbox' and description 'List messages in the current inbox' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List messages in the current inbox. It is categorised as a Read tool in the Mail Tm MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Mail Tm MCP Server MCP server in PolicyLayer and add a rule for get_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 Mail Tm MCP Server. Nothing to install.
get_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 get_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 get_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.
get_inbox is provided by the Mail Tm MCP Server MCP server (opastorello/mailtm-mcp-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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