Compare your actual CTR per page against industry benchmarks by position. Flags pages significantly underperforming for their ranking position with verdicts.
AI agents call gsc_ctr_benchmark to retrieve information from BigQuery MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads and analyzes existing data (CTR metrics and benchmark comparisons) to provide analytical insights. It performs a comparison query against analytics data and returns verdicts—purely informational retrieval with no side effects. There is no capability to modify, delete, execute code, or commit financial actions.
From the tool's definition Tool description states it 'Compare[s] your actual CTR per page against industry benchmarks' and 'Flags pages' — these are retrieval and analysis operations with no modification, deletion, or execution of external commands.
Documented attack patterns abuse exactly the kind of access gsc_ctr_benchmark gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BigQuery MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for gsc_ctr_benchmark:
{
"version": "1",
"default": "deny",
"tools": {
"gsc_ctr_benchmark": {}
}
}gsc_ctr_benchmark 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.
Compare your actual CTR per page against industry benchmarks by position. Flags pages significantly underperforming for their ranking position with verdicts. It is categorised as a Read tool in the BigQuery MCP Server MCP Server, which means it retrieves data without modifying state.
Register the BigQuery MCP Server MCP server in PolicyLayer and add a rule for gsc_ctr_benchmark: 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 BigQuery MCP Server. Nothing to install.
gsc_ctr_benchmark 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 gsc_ctr_benchmark 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 gsc_ctr_benchmark. 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.
gsc_ctr_benchmark is provided by the BigQuery MCP Server MCP server (suganthan-mohanadasan/suganthans-bigquery-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 32 BigQuery MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
32 BigQuery MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.