List all containers in the connected CosmosDB database. Use this to discover available containers and their partition key configurations before querying data. Returns container IDs, partition key paths, and indexing policies.
AI agents call mcp_list_containers to retrieve information from Mcpcosmosdb 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 database schema metadata (containers, their configurations, and indexing policies). It performs no writes, deletes, or execution of arbitrary commands. The blast radius is minimal - only information disclosure of database structure to an agent that already has connection access.
From the tool's definition Tool description states 'List all containers' and 'discover available containers' - these are query/discovery operations with no modification. Returns metadata only: 'container IDs, partition key paths, and indexing policies'. No side effects or data changes.
Attacks that exploit this kind of access
List all containers in the connected CosmosDB database. Use this to discover available containers and their partition key configurations before querying data. Returns container IDs, partition key paths, and indexing policies. It is categorised as a Read tool in the Mcpcosmosdb MCP Server, which means it retrieves data without modifying state.
Register the Mcpcosmosdb MCP server in PolicyLayer and add a rule for mcp_list_containers: 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 Mcpcosmosdb. Nothing to install.
mcp_list_containers 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 mcp_list_containers 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 mcp_list_containers. 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.
mcp_list_containers is provided by the Mcpcosmosdb MCP server (mcpcosmosdb). 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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