AI agents call scan_baud to retrieve information from Buspirate without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads data from a UART interface by testing different baud rates to find one that produces readable output. It is a non-invasive reconnaissance operation with no side effects on the target hardware or data. The scanning and scoring activity is purely observational, making it a Read category tool.
From the tool's definition Tool name 'scan_baud' and description 'Scan common baud rates and score by readable ASCII output' indicate passive scanning and measurement. No modification, execution, deletion, or financial operation is performed.
Attacks that exploit this kind of access
Scan common baud rates and score by readable ASCII output. It is categorised as a Read tool in the Buspirate MCP Server, which means it retrieves data without modifying state.
Register the Buspirate MCP server in PolicyLayer and add a rule for scan_baud: 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 Buspirate. Nothing to install.
scan_baud 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 scan_baud 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 scan_baud. 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.
scan_baud is provided by the Buspirate MCP server (mplogas/buspirate-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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