AI agents call token_auth as a supporting operation in CyberMCP workflows.
The description is empty, so the exact behavior cannot be determined. Based on the tool name and sibling tools (api_login, basic_auth, oauth2_auth, auth_bypass_check), this tool likely sets or validates a token-based authentication credential for use in subsequent API security tests. This would be a Write/Execute action (setting auth state), but without a description, confidence is low.
From the tool's definition Tool name is 'token_auth'; description is empty and uninformative.
Documented attack patterns abuse exactly the kind of access token_auth gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CyberMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for token_auth:
{
"version": "1",
"default": "deny",
"tools": {
"token_auth": {
"limits": [
{
"counter": "token_auth_rate",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
}
}token_auth gets a rate cap, and everything else on the server is denied unless you say otherwise.
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token_auth. It is categorised as a Other tool in the CyberMCP MCP Server, which means it performs auxiliary operations.
Register the Cyber MCP server in PolicyLayer and add a rule for token_auth: 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 CyberMCP. Nothing to install.
token_auth is a Other tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the token_auth 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 token_auth. 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.
token_auth is provided by the Cyber MCP server (ricauts/cybermcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CyberMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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14 CyberMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.