AI agents invoke picnic_verify_2fa_code to trigger actions in MCP Picnic. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Verifying a 2FA code is an external authentication operation that, if completed successfully, grants access to the user's Picnic account. This is not a simple read (it has side effects — it advances an auth state machine or establishes a session), nor is it purely writing data. It executes an auth flow against the Picnic backend.
From the tool's definition Verify a 2FA code — triggers an authentication/verification operation against an external service
Documented attack patterns abuse exactly the kind of access picnic_verify_2fa_code gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Picnic, and nothing reaches the server without passing your rules. This is the rule we recommend for picnic_verify_2fa_code:
{
"version": "1",
"default": "deny",
"tools": {
"picnic_verify_2fa_code": {
"limits": [
{
"counter": "picnic_verify_2fa_code_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}picnic_verify_2fa_code stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Verify a 2FA code. It is categorised as a Execute tool in the MCP Picnic MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the MCP Picnic MCP server in PolicyLayer and add a rule for picnic_verify_2fa_code: 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 Picnic. Nothing to install.
picnic_verify_2fa_code is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the picnic_verify_2fa_code 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 picnic_verify_2fa_code. 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.
picnic_verify_2fa_code is provided by the MCP Picnic MCP server (ivo-toby/mcp-picnic). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Picnic, 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.
25 MCP Picnic tools catalogued and risk-classified — across an index of 43,000+ MCP servers.