List all collections for a given database.
AI agents call list_collections to retrieve information from Legacy Mongodb without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about collections without modifying any data or executing code. It has minimal blast radius—an AI agent could at worst discover which collections exist in a database, which is informational only. The read-only server design and explicit 'list' operation classify this as Read severity low.
From the tool's definition Tool description states 'List all collections for a given database' - a pure retrieval operation. Server description emphasizes 'read-only access' and 'query databases'.
Attacks that exploit this kind of access
List all collections for a given database. It is categorised as a Read tool in the Legacy Mongodb MCP Server, which means it retrieves data without modifying state.
Register the Legacy Mongodb MCP server in PolicyLayer and add a rule for list_collections: 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 Legacy Mongodb. Nothing to install.
list_collections 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_collections 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_collections. 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_collections is provided by the Legacy Mongodb MCP server (webxspark/legacy-mongodb-mcp). 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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