List send-from identities (addresses with signatures). Auto-creates default if none exists.
AI agents call list_identities 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 or queries send-from identities and signatures without causing destructive or permanent changes. While there is an auto-create side effect for default identities, the primary function is read-only data retrieval. The blast radius of misuse is minimal—an AI agent could view email identities but cannot delete, modify, or send emails with this tool alone. This is classified as Read with low severity.
From the tool's definition Tool name is 'list_identities' and description states 'List send-from identities'. The verb 'list' is a read operation that retrieves data without modifying it.
Attacks that exploit this kind of access
List send-from identities (addresses with signatures). Auto-creates default if none exists. 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 list_identities: 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.
list_identities 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 list_identities 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 list_identities. 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.
list_identities 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.
list_identities is one line of TrekMail MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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