Get pre-populated reply-all data: to + cc (all original recipients except self), subject (Re:), quoted body.
AI agents call prepare_reply_all to retrieve information from TrekMail 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 data from an existing email message and prepares it for user review before sending. It performs no write, delete, execute, or financial operations. The output is informational only—the user must still compose and send the reply. This is purely a Read category tool with minimal security risk.
From the tool's definition Tool description states it 'Get[s] pre-populated reply-all data' with no modification, deletion, or execution of external operations.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Get pre-populated reply-all data: to + cc (all original recipients except self), subject (Re:), quoted body. It is categorised as a Read tool in the TrekMail MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for prepare_reply_all: 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 TrekMail MCP Server. Nothing to install.
prepare_reply_all 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 prepare_reply_all 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 prepare_reply_all. 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.
prepare_reply_all is provided by the TrekMail MCP Server MCP server (trekmail/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.
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