list_connected_boards
AI agents call list_connected_boards to retrieve information from Arduino MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves board information without modifying any state. The 'list' prefix and context within an Arduino CLI server strongly suggest it performs a read-only enumeration. No side effects are expected. Low severity due to minimal blast radius—knowing what boards are connected poses no direct security risk.
From the tool's definition Tool name 'list_connected_boards' indicates a query/list operation that retrieves information about connected Arduino boards.
Attacks that exploit this kind of access
list_connected_boards. It is categorised as a Read tool in the Arduino MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Arduino MCP Server MCP server in PolicyLayer and add a rule for list_connected_boards: 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 Arduino MCP Server. Nothing to install.
list_connected_boards 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 list_connected_boards 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 list_connected_boards. 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.
list_connected_boards is provided by the Arduino MCP Server MCP server (niradler/arduino-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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