List cards, optionally filtered by deck
AI agents call list_cards to retrieve information from Mochi MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries existing flashcard data with optional filtering. It has no side effects, does not create, modify, or delete any data, and does not execute code or move money. It is a straightforward Read operation with minimal blast radius if misused.
From the tool's definition Tool name is 'list_cards' and description states 'List cards, optionally filtered by deck' — a retrieval operation with no modification or deletion capability.
Attacks that exploit this kind of access
List cards, optionally filtered by deck. It is categorised as a Read tool in the Mochi MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Mochi MCP Server MCP server in PolicyLayer and add a rule for list_cards: 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 Mochi MCP Server. Nothing to install.
list_cards 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_cards 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_cards. 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_cards is provided by the Mochi MCP Server MCP server (shunkus/mochi-mcp-server). 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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