List all network instances (VRFs) configured on the device,
AI agents call get_network_instances to retrieve information from sheridan Lab Jack 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 configuration data (VRF/network instance information) from a Nokia SR Linux device without modifying, executing, or deleting anything. It is purely informational, making it a Read operation with low severity.
From the tool's definition Tool name 'get_network_instances' and description 'List all network instances (VRFs) configured on the device' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all network instances (VRFs) configured on the device,. It is categorised as a Read tool in the sheridan Lab Jack MCP Server, which means it retrieves data without modifying state.
Register the sheridan Lab Jack MCP server in PolicyLayer and add a rule for get_network_instances: 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 sheridan Lab Jack. Nothing to install.
get_network_instances 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_network_instances 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_network_instances. 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_network_instances is provided by the sheridan Lab Jack MCP server (jackg27/sheridan-lab-jack). 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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