AI agents call mobbin_list_collections to retrieve information from Mobbin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays existing collections and their metadata. It performs a query operation that returns data without creating, modifying, deleting, or executing anything. The blast radius of misuse is minimal — an agent could only view collection information already accessible to the authenticated user.
From the tool's definition Tool name contains 'list' and description states 'List your saved Mobbin collections with item counts' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List your saved Mobbin collections with item counts. It is categorised as a Read tool in the Mobbin MCP Server, which means it retrieves data without modifying state.
Register the Mobbin MCP server in PolicyLayer and add a rule for mobbin_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 Mobbin. Nothing to install.
mobbin_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 mobbin_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 mobbin_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.
mobbin_list_collections is provided by the Mobbin MCP server (mobbin-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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