Get all devices from Fibaro HC3, with optional filtering by room or device type
AI agents call get_devices to retrieve information from HC3 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves device information from a smart home system. While categorized as Read (no data modification), the severity is elevated to medium because the returned device data could reveal sensitive information about the physical environment, security infrastructure, and occupancy patterns that could be exploited for surveillance or targeted attacks if misused by a compromised AI agent.
From the tool's definition Tool name 'get_devices' and description 'Get all devices from Fibaro HC3, with optional filtering by room or device type' indicate data retrieval with no modification. The verb 'Get' and lack of any side-effect language confirm read-only operation.
Attacks that exploit this kind of access
Get all devices from Fibaro HC3, with optional filtering by room or device type. It is categorised as a Read tool in the HC3 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the HC3 MCP Server MCP server in PolicyLayer and add a rule for get_devices: 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 HC3 MCP Server. Nothing to install.
get_devices 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 get_devices 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 get_devices. 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.
get_devices is provided by the HC3 MCP Server MCP server (jangabrielsson/hc3_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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