AI agents call get_field_statistics to retrieve information from QGIS MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries existing GIS data to generate summary statistics without creating, modifying, deleting, or executing arbitrary code. It is a pure read operation on field data. The low severity reflects that misuse would only expose or calculate statistics from accessible data, with no destructive or operational side effects.
From the tool's definition Tool computes and returns aggregate statistics (count, sum, mean, min, max, stdev) for a numeric field—a data retrieval and analysis operation with no modification or deletion of underlying data.
Attacks that exploit this kind of access
Compute aggregate statistics (count, sum, mean, min, max, stdev) for a numeric field. It is categorised as a Read tool in the QGIS MCP MCP Server, which means it retrieves data without modifying state.
Register the QGIS MCP server in PolicyLayer and add a rule for get_field_statistics: 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 QGIS MCP. Nothing to install.
get_field_statistics 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_field_statistics 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_field_statistics. 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_field_statistics is provided by the QGIS MCP server (nkarasiak/qgis-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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