MCP Tool Reference High Risk

run_chdb_select_query

Execute SQL queries using chDB embedded engine

Part of the ClickHouse MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

ClickHouse/mcp-clickhouse Execute

WHEN AI AGENTS USE THIS TOOL

AI agents invoke run_chdb_select_query to trigger processes or run actions in ClickHouse. Execute operations can have side effects beyond the immediate call — triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.

WHY ENFORCE A POLICY ON RUN_CHDB_SELECT_QUERY

run_chdb_select_query can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. Intercept enforces rate limits and validates arguments to keep execution within safe bounds.

RECOMMENDED POLICY

Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.

clickhouse.yaml 
tools:
  run_chdb_select_query:
    rules:
      - action: allow
        rate_limit:
          max: 10
          window: 60
        validate:
          required_args: true

See the full ClickHouse policy for all 4 tools.

DETAILS

Tool Name

run_chdb_select_query

Category

Execute

MCP Server

ClickHouse MCP Server

Risk Level

High

MORE CLICKHOUSE TOOLS

run_query Execute
Execute SQL queries on ClickHouse cluster
list_databases Read
List all databases on ClickHouse cluster
list_tables Read
List tables in a database with pagination and optional metadata

SIMILAR EXECUTE TOOLS ON OTHER SERVERS

call-actor Apify
Call an Actor and get its run results
boot_simulator Appium
Boot an iOS simulator
setup_wda Appium
Download and setup WebDriverAgent for iOS simulators
install_wda Appium
Install and launch WebDriverAgent on an iOS simulator
auth0_deploy_action Auth0
Deploy an Auth0 action
auth0_publish_form Auth0
Publish an Auth0 form

RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the run_chdb_select_query tool do?

Execute SQL queries using chDB embedded engine. It is categorised as a Execute tool in the ClickHouse MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run_chdb_select_query?

Add a rule in your Intercept YAML policy under the tools section for run_chdb_select_query. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the ClickHouse MCP server.

What risk level is run_chdb_select_query?

run_chdb_select_query is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit run_chdb_select_query?

Yes. Add a rate_limit block to the run_chdb_select_query rule in your Intercept 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.

How do I block run_chdb_select_query completely?

Set action: deny in the Intercept policy for run_chdb_select_query. 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.

What MCP server provides run_chdb_select_query?

run_chdb_select_query is provided by the ClickHouse MCP server (ClickHouse/mcp-clickhouse). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

ENFORCE POLICIES ON CLICKHOUSE

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Full ClickHouse policy →