keychaincredential_remote_ssh_scan
Scan a remote host for its SSH host key
This record as markdown: /tools/nasbridge/keychaincredential-remote-ssh-scan.md
What keychaincredential_remote_ssh_scan does on Nasbridge
AI agents call keychaincredential_remote_ssh_scan to retrieve information from Nasbridge without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why keychaincredential_remote_ssh_scan is rated Low
The tool performs network discovery and retrieval of public SSH host keys, which is a non-destructive query operation. While it touches external systems, the action is informational only and does not execute code, modify data, or cause side effects on the target or the TrueNAS system itself.
From the tool's definition Tool name includes 'scan' and description states 'Scan a remote host for its SSH host key' — this is a read-only operation that queries and retrieves the SSH host key from a remote system without modifying or deleting anything.
Attacks that exploit this kind of access
The rule that runs keychaincredential_remote_ssh_scan safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Nasbridge, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For keychaincredential_remote_ssh_scan, this is the rule to start with:
keychaincredential_remote_ssh_scan 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 Nasbridge, apply this rule, and every keychaincredential_remote_ssh_scan call is checked against it from then on.
Questions about keychaincredential_remote_ssh_scan
Scan a remote host for its SSH host key. It is categorised as a Read tool in the Nasbridge MCP Server, which means it retrieves data without modifying state.
Register the Nasbridge MCP server in PolicyLayer and add a rule for keychaincredential_remote_ssh_scan: 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 Nasbridge. Nothing to install.
keychaincredential_remote_ssh_scan 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 keychaincredential_remote_ssh_scan 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 keychaincredential_remote_ssh_scan. 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.
keychaincredential_remote_ssh_scan is provided by the Nasbridge MCP server (maverick0628/nasbridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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