List all available mailboxes/folders
AI agents call list_mailboxes to retrieve information from MCP Mail Organizer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about available mailboxes without creating, modifying, or deleting any data. It is a read-only enumeration operation with minimal security impact, as it only discloses the structure of the user's email account.
From the tool's definition Tool name 'list_mailboxes' and description 'List all available mailboxes/folders' indicate a query/retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List all available mailboxes/folders. It is categorised as a Read tool in the MCP Mail Organizer MCP Server, which means it retrieves data without modifying state.
Register the MCP Mail Organizer MCP server in PolicyLayer and add a rule for list_mailboxes: 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 MCP Mail Organizer. Nothing to install.
list_mailboxes 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_mailboxes 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_mailboxes. 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_mailboxes is provided by the MCP Mail Organizer MCP server (neomody77/mcp-mail-organizer). 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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