List all Blob Storage containers
AI agents call blob_container_list to retrieve information from Azure MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates existing Blob Storage containers without modifying, deleting, or executing any operations. It is a straightforward read operation with minimal blast radius if misused by an AI agent—an attacker could discover available containers but cannot access, modify, or delete them without additional permissions or tools.
From the tool's definition Tool name includes 'list' and description states 'List all Blob Storage containers' — a query operation with no side effects.
Attacks that exploit this kind of access
List all Blob Storage containers. It is categorised as a Read tool in the Azure MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Azure MCP Server MCP server in PolicyLayer and add a rule for blob_container_list: 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 Azure MCP Server. Nothing to install.
blob_container_list 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 blob_container_list 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 blob_container_list. 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.
blob_container_list is provided by the Azure MCP Server MCP server (mashriram/azure_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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