Authenticate as user with email and password. Stores the token for subsequent requests.
AI agents use authenticate_user to create or update resources in PocketBase MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PocketBase MCP Server environment.
Authentication itself doesn't read or destroy data, but it creates a session/token and stores state for subsequent requests, making it a Write-category action. Misuse could allow unauthorized access to the system, hence medium severity.
From the tool's definition Authenticate as user with email and password. Stores the token for subsequent requests.
Documented attack patterns abuse exactly the kind of access authenticate_user gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PocketBase MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for authenticate_user:
{
"version": "1",
"default": "deny",
"tools": {
"authenticate_user": {
"limits": [
{
"counter": "authenticate_user_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}authenticate_user 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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Authenticate as user with email and password. Stores the token for subsequent requests. It is categorised as a Write tool in the PocketBase MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the PocketBase MCP Server MCP server in PolicyLayer and add a rule for authenticate_user: 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 PocketBase MCP Server. Nothing to install.
authenticate_user 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 authenticate_user 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 authenticate_user. 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.
authenticate_user is provided by the PocketBase MCP Server MCP server (ssakone/pb_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 PocketBase MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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19 PocketBase MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.