filesystem_stat
Get file or directory info including permissions, size, owner, and timestamps. Provide the full path on the TrueNAS system.
This record as markdown: /tools/spranab-truenas-mcp/filesystem-stat.md
What filesystem_stat does on Truenas
AI agents call filesystem_stat to retrieve information from Truenas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why filesystem_stat is rated Low
The tool performs read-only queries to retrieve metadata about files and directories on the TrueNAS system. It does not create, modify, delete, or execute anything — it only gathers and returns information about existing filesystem entities.
From the tool's definition Tool description states 'Get file or directory info including permissions, size, owner, and timestamps' — purely retrieval operations with no modification or execution capability.
Attacks that exploit this kind of access
The rule that runs filesystem_stat safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Truenas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For filesystem_stat, this is the rule to start with:
filesystem_stat is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Truenas, apply this rule, and every filesystem_stat call is checked against it from then on.
Questions about filesystem_stat
Get file or directory info including permissions, size, owner, and timestamps. Provide the full path on the TrueNAS system. It is categorised as a Read tool in the Truenas MCP Server, which means it retrieves data without modifying state.
Register the Truenas MCP server in PolicyLayer and add a rule for filesystem_stat: 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. Nothing to install.
filesystem_stat 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 filesystem_stat 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 filesystem_stat. 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.
filesystem_stat is provided by the Truenas MCP server (spranab/truenas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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