Aggregate occurrence counts across a dimension (COUNTRY, STATE_PROVINCE, YEAR, BASIS_OF_RECORD, DATASET_KEY, KINGDOM_KEY, etc.). Returns the top-N facet values ranked by count — no record payloads returned. Core tool for distribution analysis and trend queries: "which countries have the most reco...
Part of the Gbif Biodiversity Mcp Server server.
Free to start. No card required.
AI agents call gbif_occurrence_facets to retrieve information from Gbif Biodiversity Mcp Server 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 gbif_occurrence_facets 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": {
"gbif_occurrence_facets": {}
}
}See the full Gbif Biodiversity Mcp Server policy for all 12 tools.
These attack patterns abuse exactly the kind of access gbif_occurrence_facets 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.
Aggregate occurrence counts across a dimension (COUNTRY, STATE_PROVINCE, YEAR, BASIS_OF_RECORD, DATASET_KEY, KINGDOM_KEY, etc.). Returns the top-N facet values ranked by count — no record payloads returned. Core tool for distribution analysis and trend queries: "which countries have the most records for this species?", "how has observation volume changed since 2010?". Scope the aggregation with taxonKey, country, year, geometry, or basisOfRecord filters.. It is categorised as a Read tool in the Gbif Biodiversity Mcp Server MCP Server, which means it retrieves data without modifying state.
Register the Gbif Biodiversity Mcp Server MCP server in PolicyLayer and add a rule for gbif_occurrence_facets: 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 Gbif Biodiversity Mcp Server. Nothing to install.
gbif_occurrence_facets 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 gbif_occurrence_facets 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 gbif_occurrence_facets. 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.
gbif_occurrence_facets is provided by the Gbif Biodiversity Mcp Server MCP server (@cyanheads/gbif-biodiversity-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 12 Gbif Biodiversity Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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