AI agents call list_regions 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 OCI regions the tenancy is subscribed to. It performs no side effects, does not execute code or commands, does not modify data, and does not delete or commit financial transactions. It is a straightforward informational read operation consistent with other listing tools (list_buckets, list_instances, list_compartments) on the same server.
From the tool's definition Tool name 'list_regions' and description 'List all OCI regions' indicate a read-only query operation that retrieves region metadata without modifying or executing actions. Returns informational data only.
Attacks that exploit this kind of access
List all OCI regions the tenancy is subscribed to, marking the home region. 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_regions: 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_regions 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_regions 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_regions. 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_regions 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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