Lists every API category (OpenAPI tag) with its display group, endpoint count, and description.
AI agents call list_categories to retrieve information from Tossinvest Openapi 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 organizational metadata about API categories without creating, modifying, deleting, executing code, or committing any financial transactions. It is a pure read operation that helps users explore the API structure.
From the tool's definition Tool name 'list_categories' combined with description 'Lists every API category' indicates a query/retrieval operation with no side effects. It returns metadata about available endpoint groupings.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Lists every API category (OpenAPI tag) with its display group, endpoint count, and description. It is categorised as a Read tool in the Tossinvest Openapi MCP Server, which means it retrieves data without modifying state.
Register the Tossinvest Openapi MCP server in PolicyLayer and add a rule for list_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 Tossinvest Openapi. Nothing to install.
list_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 list_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 list_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.
list_categories is provided by the Tossinvest Openapi MCP server (jeongseongmok/tossinvest-openapi-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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