Store an env-style secret as an encrypted proof. Creates an ownership-basic proof with secret-storage tags. Values are AES-256-GCM sealed and never returned in plaintext via MCP.
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Part of the NEUS MCP server.
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AI agents use neus_secret_create to create or modify resources in NEUS MCP. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call neus_secret_create repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach NEUS MCP.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"neus_secret_create": {
"limits": [
{
"counter": "neus_secret_create_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full NEUS MCP policy for all 12 tools.
These attack patterns abuse exactly the kind of access neus_secret_create gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Store an env-style secret as an encrypted proof. Creates an ownership-basic proof with secret-storage tags. Values are AES-256-GCM sealed and never returned in plaintext via MCP.. It is categorised as a Write tool in the NEUS MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the NEUS MCP server in PolicyLayer and add a rule for neus_secret_create: 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 NEUS MCP. Nothing to install.
neus_secret_create 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 neus_secret_create 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 neus_secret_create. 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.
neus_secret_create is provided by the NEUS MCP server (https://mcp.neus.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 NEUS MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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