sensitive_data_check
AI agents call sensitive_data_check to retrieve information from CyberMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears designed to inspect, query, or scan for sensitive data exposure as part of security testing. While named as a check/scan operation, it primarily reads and reports on data state rather than executing code or modifying data.
From the tool's definition Tool name 'sensitive_data_check' indicates querying or inspection for sensitive data exposure. The server context describes testing for 'data leakage,' suggesting this tool likely retrieves or analyzes data to identify vulnerabilities rather than modifying…
Documented attack patterns abuse exactly the kind of access sensitive_data_check 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 sensitive_data_check:
{
"version": "1",
"default": "deny",
"tools": {
"sensitive_data_check": {}
}
}sensitive_data_check is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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sensitive_data_check. It is categorised as a Read tool in the CyberMCP MCP Server, which means it retrieves data without modifying state.
Register the Cyber MCP server in PolicyLayer and add a rule for sensitive_data_check: 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.
sensitive_data_check is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the sensitive_data_check 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 sensitive_data_check. 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.
sensitive_data_check 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.