Get the structure of a table: what variables it has and what values are available. REQUIRED before querying - shows you: - Variable names (Alue=Region, Vuosi=Year, Sukupuoli=Gender, etc.) - Value codes (KU091=Helsinki, SSS=Total, 2024=year 2024) - Which variables are required vs optional - Total ...
AI agents call get_table_metadata to retrieve information from Tilastokeskus StatFin 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 and queries metadata about database table structure—a classic Read operation with no side effects. It returns informational data (variable definitions, available codes, combination counts) to enable informed use of other tools. The blast radius of misuse is minimal; an AI agent querying this repeatedly poses no risk to data integrity or system resources beyond normal API load.
From the tool's definition Tool name 'get_table_metadata' and description indicate it 'shows' variable names, value codes, required vs optional variables, and total data combinations.
Documented attack patterns abuse exactly the kind of access get_table_metadata gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Tilastokeskus StatFin MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_table_metadata:
{
"version": "1",
"default": "deny",
"tools": {
"get_table_metadata": {}
}
}get_table_metadata is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the structure of a table: what variables it has and what values are available. REQUIRED before querying - shows you: - Variable names (Alue=Region, Vuosi=Year, Sukupuoli=Gender, etc.) - Value codes (KU091=Helsinki, SSS=Total, 2024=year 2024) - Which variables are required vs optional - Total possible data combinations Example response shows: Alue has 309 regions, Vuosi has 53 years, etc. After understanding the structure, use query_table with specific selections. It is categorised as a Read tool in the Tilastokeskus StatFin MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tilastokeskus StatFin MCP Server MCP server in PolicyLayer and add a rule for get_table_metadata: 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 Tilastokeskus StatFin MCP Server. Nothing to install.
get_table_metadata 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_table_metadata 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_table_metadata. 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_table_metadata is provided by the Tilastokeskus StatFin MCP Server MCP server (markusl/statfin-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Tilastokeskus StatFin 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.
7 Tilastokeskus StatFin MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.