Get current temperatures for all disks.
AI agents call get_disk_temps to retrieve information from Truenas Ws without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple data retrieval operation—querying disk temperature sensors. It has no side effects, does not modify system state, does not execute code, and does not access sensitive user data or credentials. The blast radius of misuse is minimal: an agent could only retrieve hardware telemetry that is typically already exposed through standard system monitoring interfaces.
From the tool's definition Tool name 'get_disk_temps' and description 'Get current temperatures for all disks' indicate a read-only query operation that retrieves system monitoring data without modification or execution.
Attacks that exploit this kind of access
Get current temperatures for all disks. It is categorised as a Read tool in the Truenas Ws MCP Server, which means it retrieves data without modifying state.
Register the Truenas Ws MCP server in PolicyLayer and add a rule for get_disk_temps: 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 Truenas Ws. Nothing to install.
get_disk_temps 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_disk_temps 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_disk_temps. 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_disk_temps is provided by the Truenas Ws MCP server (thoriphes/truenas-ws-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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