Retrieve the current TOTP code for a saved device ID or base32 shared secret.
AI agents call mailosaur_devices_otp to retrieve information from Mailosaur MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs data retrieval without modifying state. While TOTP codes are sensitive authentication credentials that could be misused if an agent obtains one (enabling unauthorized account access elsewhere), the tool itself only reads/retrieves data. It is not Execute (does not trigger actions), Destructive (does not delete), Financial (does not move money), or Write (does not modify data).
From the tool's definition Tool retrieves ('Retrieve') the current TOTP code for a device ID or shared secret. TOTP codes are time-based one-time passwords used for authentication.
Attacks that exploit this kind of access
Retrieve the current TOTP code for a saved device ID or base32 shared secret. It is categorised as a Read tool in the Mailosaur MCP MCP Server, which means it retrieves data without modifying state.
Register the Mailosaur MCP server in PolicyLayer and add a rule for mailosaur_devices_otp: 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 Mailosaur MCP. Nothing to install.
mailosaur_devices_otp 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 mailosaur_devices_otp 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 mailosaur_devices_otp. 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.
mailosaur_devices_otp is provided by the Mailosaur MCP server (mrnewdelhi/mailosaur-mcp). 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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