Get all categories with optional format (nested or flattened)
AI agents call get_all_categories to retrieve information from Lunch Money 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 category metadata from a Lunch Money account. While it operates in a financial context, the action itself is read-only—it queries and returns existing category data without creating, modifying, deleting, or moving money. Although misuse could expose financial structure information, the blast radius is limited to information disclosure rather than financial loss or destructive action.
From the tool's definition Tool name 'get_all_categories' and description 'Get all categories with optional format (nested or flattened)' indicate a retrieval operation that returns existing data without modification or side effects.
Attacks that exploit this kind of access
Get all categories with optional format (nested or flattened). It is categorised as a Read tool in the Lunch Money MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Lunch Money MCP Server MCP server in PolicyLayer and add a rule for get_all_categories: 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 Lunch Money MCP Server. Nothing to install.
get_all_categories 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 get_all_categories 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 get_all_categories. 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.
get_all_categories is provided by the Lunch Money MCP Server MCP server (matiasl13/lunchmoney-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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