Get a conversation thread with all its emails in chronological order.
AI agents call get_thread to retrieve information from Lobstermail without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get_thread' tool retrieves and returns existing email conversation data without creating, modifying, deleting, or executing any operations. It is a read-only query operation. While email data may contain sensitive information, the tool itself performs no destructive, financial, or executable actions.
From the tool's definition Tool description states 'Get a conversation thread with all its emails in chronological order' — a pure retrieval operation with no modification or deletion.
Attacks that exploit this kind of access
Get a conversation thread with all its emails in chronological order. It is categorised as a Read tool in the Lobstermail MCP Server, which means it retrieves data without modifying state.
Register the Lobstermail MCP server in PolicyLayer and add a rule for 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 Lobstermail. Nothing to install.
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 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 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.
get_thread is provided by the Lobstermail MCP server (lobster-kit/mcp-server-lobstermail). 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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