List collections
AI agents call list_collections to retrieve information from Firebase Realtime Database 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 metadata about existing collections in the Firebase Realtime Database. It retrieves information only and does not create, modify, delete, or execute any operations. The blast radius is minimal—an AI agent listing collections gains only informational access to the database schema without ability to access, modify, or destroy data.
From the tool's definition Tool name 'list_collections' and description 'List collections' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List collections. It is categorised as a Read tool in the Firebase Realtime Database MCP Server, which means it retrieves data without modifying state.
Register the Firebase Realtime Database 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 Firebase Realtime Database. 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 Firebase Realtime Database MCP server (ytzlax/firebase-realtimedb-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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