List all configured email accounts.
AI agents call list_accounts to retrieve information from MCP Email Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool simply retrieves and returns information about existing email accounts without modifying, deleting, or executing any operations. It is a straightforward query/enumeration function that has no impact beyond data disclosure. While account enumeration could theoretically inform reconnaissance, the actual risk depends on access controls; the tool itself is purely informational.
From the tool's definition The tool 'list_accounts' lists all configured email accounts. The word 'list' indicates a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all configured email accounts. It is categorised as a Read tool in the MCP Email Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Email Server MCP server in PolicyLayer and add a rule for list_accounts: 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 Email Server. Nothing to install.
list_accounts 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_accounts 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_accounts. 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_accounts is provided by the MCP Email Server MCP server (kentaroh7777/mcp-email-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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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