AI agents invoke stop_emba_scan to trigger actions in EMBA-MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Stopping an active scan is an Execute action that triggers an external operation (halting the EMBA firmware analysis engine). While not destructive of data or financial in nature, it interrupts a system operation whose continuation state depends on the tool's invocation. This could disrupt analysis workflows and has blast radius potential if invoked by an AI agent without user intent.
From the tool's definition Tool name 'stop_emba_scan' indicates termination of an active firmware analysis scan process.
Documented attack patterns abuse exactly the kind of access stop_emba_scan gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and EMBA-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for stop_emba_scan:
{
"version": "1",
"default": "deny",
"tools": {
"stop_emba_scan": {
"limits": [
{
"counter": "stop_emba_scan_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}stop_emba_scan stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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stop_emba_scan. It is categorised as a Execute tool in the EMBA-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the EMBA- MCP server in PolicyLayer and add a rule for stop_emba_scan: 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 EMBA-MCP. Nothing to install.
stop_emba_scan is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the stop_emba_scan 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 stop_emba_scan. 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.
stop_emba_scan is provided by the EMBA- MCP server (0xbuz3r/emba-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from EMBA-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
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