Return an EIP-5792 transactions[] batch the user signs ONCE to deploy their vault + register spending rules. After signing, the keeper runs the workflow autonomously per the on-chain caps.
Part of the CTRL server.
Free to start. No card required.
AI agents use ctrl_activate to create or modify resources in CTRL. 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 ctrl_activate 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 CTRL.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"ctrl_activate": {
"limits": [
{
"counter": "ctrl_activate_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full CTRL policy for all 6 tools.
These attack patterns abuse exactly the kind of access ctrl_activate 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.
Return an EIP-5792 transactions[] batch the user signs ONCE to deploy their vault + register spending rules. After signing, the keeper runs the workflow autonomously per the on-chain caps.. It is categorised as a Write tool in the CTRL MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the CTRL MCP server in PolicyLayer and add a rule for ctrl_activate: 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 CTRL. Nothing to install.
ctrl_activate 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 ctrl_activate 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 ctrl_activate. 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.
ctrl_activate is provided by the CTRL MCP server (https://www.ctrl.build/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 CTRL tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.