Listet alle Datenkategorien (Gruppen) im Katalog auf oder zeigt Details einer Kategorie.
AI agents call berlin_list_categories to retrieve information from Berlin Open Data MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns metadata about available categories in Berlin's open data catalog. It performs only read operations—listing or retrieving category information—with no ability to modify, delete, execute code, or trigger external operations. The blast radius of misuse is minimal, limited to information disclosure of publicly available catalog structure.
From the tool's definition Tool name 'berlin_list_categories' and description 'Listet alle Datenkategorien (Gruppen) im Katalog auf oder zeigt Details einer Kategorie' (Lists all data categories in the catalog or shows details of a category) indicate a retrieval operation with no side…
Documented attack patterns abuse exactly the kind of access berlin_list_categories gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Berlin Open Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for berlin_list_categories:
{
"version": "1",
"default": "deny",
"tools": {
"berlin_list_categories": {}
}
}berlin_list_categories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Listet alle Datenkategorien (Gruppen) im Katalog auf oder zeigt Details einer Kategorie. It is categorised as a Read tool in the Berlin Open Data MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Berlin Open Data MCP Server MCP server in PolicyLayer and add a rule for berlin_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 Berlin Open Data MCP Server. Nothing to install.
berlin_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 berlin_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 berlin_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.
berlin_list_categories is provided by the Berlin Open Data MCP Server MCP server (tifa365/berlin-opendata-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Berlin Open Data MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
6 Berlin Open Data MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.