list_installed_cores
AI agents call list_installed_cores 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 or enumerates data about Arduino cores already installed on the system with no side effects, modifications, deletions, or external operations. It is a read-only information retrieval function consistent with the Read category. Severity is low as the worst outcome is information disclosure about the development environment.
From the tool's definition Tool name 'list_installed_cores' indicates a listing/query operation that retrieves information about installed Arduino cores.
Attacks that exploit this kind of access
list_installed_cores. 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_installed_cores: 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_installed_cores 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_installed_cores 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_installed_cores. 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_installed_cores 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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