Get a statistical overview of a CKAN portal: total dataset count and breakdown by category, format, and organization. Single CKAN call (package_search with rows=0 and facets). No query needed. Args: - server_url (string): Base URL of the CKAN server - facet_limit (number): Max entries per facet s...
Part of the Ckan server.
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AI agents call ckan_catalog_stats to retrieve information from Ckan without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though ckan_catalog_stats only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"ckan_catalog_stats": {}
}
}See the full Ckan policy for all 20 tools.
These attack patterns abuse exactly the kind of access ckan_catalog_stats gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Get a statistical overview of a CKAN portal: total dataset count and breakdown by category, format, and organization. Single CKAN call (package_search with rows=0 and facets). No query needed. Args: - server_url (string): Base URL of the CKAN server - facet_limit (number): Max entries per facet section (default 20) - response_format ('markdown' | 'json'): Output format Returns: Total dataset count, categories ranked by count, file formats ranked by count, organizations ranked by count. Typical workflow: ckan_catalog_stats (understand the portal) → ckan_package_search (query specific data). It is categorised as a Read tool in the Ckan MCP Server, which means it retrieves data without modifying state.
Register the Ckan MCP server in PolicyLayer and add a rule for ckan_catalog_stats: 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 Ckan. Nothing to install.
ckan_catalog_stats 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 ckan_catalog_stats 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 ckan_catalog_stats. 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.
ckan_catalog_stats is provided by the Ckan MCP server (@aborruso/ckan-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 Ckan tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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