Generate the current TOTP authentication code for an item in Proton Pass. Use for autonomous 2FA.
AI agents call pass__get_totp to retrieve information from Proton-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Although this is technically a Read operation (retrieves TOTP codes without modifying data), the severity is high because TOTP codes are authentication secrets. If an AI agent misuses this tool, an attacker could obtain valid 2FA codes to compromise accounts, even though the tool itself only reads/generates rather than modifies. The blast radius depends on what accounts the agent can access via Proton Pass.
From the tool's definition Tool name 'pass__get_totp' and description 'Generate the current TOTP authentication code' indicates retrieval of time-based one-time password data. No modification or deletion occurs.
Documented attack patterns abuse exactly the kind of access pass__get_totp gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Proton-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for pass__get_totp:
{
"version": "1",
"default": "deny",
"tools": {
"pass__get_totp": {}
}
}pass__get_totp is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Generate the current TOTP authentication code for an item in Proton Pass. Use for autonomous 2FA. It is categorised as a Read tool in the Proton-MCP MCP Server, which means it retrieves data without modifying state.
Register the Proton- MCP server in PolicyLayer and add a rule for pass__get_totp: 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 Proton-MCP. Nothing to install.
pass__get_totp 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 pass__get_totp 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 pass__get_totp. 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.
pass__get_totp is provided by the Proton- MCP server (jorgenclaw/proton-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Proton-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
36 Proton-MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.