list_item_types
AI agents call list_item_types to retrieve information from Expense Tracker MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name implies retrieval of item type metadata stored in the SQLite database. Even without a description, 'list' is a passive operation that queries existing data. Context from sibling tools (get_item_history for data retrieval, import_receipt_from_pdf for ingestion) supports that this tool retrieves classification categories. No side effects or modifications are implied.
From the tool's definition Tool name 'list_item_types' with no description suggests querying or enumerating available item categories in the expense database. The verb 'list' is a canonical Read operation that retrieves data without modification.
Attacks that exploit this kind of access
list_item_types. It is categorised as a Read tool in the Expense Tracker MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Expense Tracker MCP Server MCP server in PolicyLayer and add a rule for list_item_types: 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 Expense Tracker MCP Server. Nothing to install.
list_item_types 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_item_types 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_item_types. 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_item_types is provided by the Expense Tracker MCP Server MCP server (sharan0402/expense-tracker-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.
Teams ship this data inside their own products. See what a licence covers →