List available RAG collections (vector stores).
AI agents call rag_list_collections to retrieve information from MCP Math Calculator 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 RAG collections without creating, modifying, or deleting data. It is a read-only query operation with minimal blast radius—an AI agent listing collections poses no risk of data loss or unintended modifications.
From the tool's definition Tool name includes 'list' and description states 'List available RAG collections' with no modification or deletion capabilities mentioned.
Attacks that exploit this kind of access
List available RAG collections (vector stores). It is categorised as a Read tool in the MCP Math Calculator Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Math Calculator Server MCP server in PolicyLayer and add a rule for rag_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 MCP Math Calculator Server. Nothing to install.
rag_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 rag_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 rag_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.
rag_list_collections is provided by the MCP Math Calculator Server MCP server (r-yash/mcpserver). 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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