Notify Legiti of a new account creation. Convenience wrapper over track_account with action=
AI agents use track_signup to create or update resources in Mcp Ap2 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Ap2 environment.
This tool creates/writes a new account record or notification event (account creation tracking). It is a Write operation as it registers new data about a signup. No execution of code, financial movement, or irreversible deletion is implied. Severity is medium as misuse could create fraudulent account records or pollute audit trails in a payment/trust system.
From the tool's definition 'Notify Legiti of a new account creation. Convenience wrapper over track_account with action='
Documented attack patterns abuse exactly the kind of access track_signup gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for track_signup:
{
"version": "1",
"default": "deny",
"tools": {
"track_signup": {
"limits": [
{
"counter": "track_signup_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}track_signup stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Notify Legiti of a new account creation. Convenience wrapper over track_account with action=. It is categorised as a Write tool in the Mcp Ap2 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for track_signup: 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 Ap2. Nothing to install.
track_signup is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the track_signup 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 track_signup. 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.
track_signup is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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