AI agents call list_vcns to retrieve information from Oci without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of VCNs from OCI without creating, modifying, deleting, or executing anything. It is a straightforward data retrieval operation consistent with other Read-category tools on the server (list_instances, list_buckets, list_compartments). The risk is low because listing network resources provides visibility only and cannot damage or alter infrastructure.
From the tool's definition Tool name 'list_vcns' and description 'List Virtual Cloud Networks (VCNs) in a compartment' indicate a retrieval/query operation with no mutation or side effects.
Attacks that exploit this kind of access
List Virtual Cloud Networks (VCNs) in a compartment. It is categorised as a Read tool in the Oci MCP Server, which means it retrieves data without modifying state.
Register the Oci MCP server in PolicyLayer and add a rule for list_vcns: 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 Oci. Nothing to install.
list_vcns 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 list_vcns 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 list_vcns. 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.
list_vcns is provided by the Oci MCP server (sauryadas/oci-mcp-server). 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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