Get a full email thread with messages (newest 200 by default)
AI agents call mail_get_thread to retrieve information from Mailgent MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays email thread contents without creating, modifying, deleting, or executing external operations. It is purely informational. The 'Get' verb and query-like semantics confirm Read category. Severity is low because email retrieval poses minimal risk—an agent accessing email threads cannot cause irreversible harm, financial loss, or code execution through this operation alone.
From the tool's definition Tool name 'mail_get_thread' and description 'Get a full email thread with messages' indicate retrieval of existing data with no modification or deletion. The action is a query/fetch operation with no side effects.
Attacks that exploit this kind of access
Get a full email thread with messages (newest 200 by default). It is categorised as a Read tool in the Mailgent MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Mailgent MCP Server MCP server in PolicyLayer and add a rule for mail_get_thread: 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 Mailgent MCP Server. Nothing to install.
mail_get_thread 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_get_thread 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_get_thread. 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_get_thread is provided by the Mailgent MCP Server MCP server (loomal-ai/loomal-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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