AI agents call list_buckets 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 retrieves information about existing Object Storage buckets without creating, modifying, or deleting any resources. It is a read-only operation with no side effects, consistent with the Read category. The severity is low because enumeration of buckets poses minimal risk unless sensitive naming conventions expose business logic, but the primary function is informational.
From the tool's definition Tool name 'list_buckets' and description 'List Object Storage buckets in a compartment' indicate a query/enumeration operation with no modification or deletion of data.
Attacks that exploit this kind of access
List Object Storage buckets 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_buckets: 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_buckets 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_buckets 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_buckets. 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_buckets 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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