parent_segment_sql

[EXPERIMENTAL] Get the SQL statement for a parent segment (audience). Requires parent_segment_id parameter. Use list_parent_segments first to find available parent segment IDs.

ServerTreasure Data MCP Server
CategoryRead

How to control parent_segment_sql ↓

WHAT IT DOES

What parent_segment_sql does on Treasure Data MCP Server

AI agents call parent_segment_sql to retrieve information from Treasure Data MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why parent_segment_sql needs a policy

This tool only queries and retrieves metadata (the SQL definition) of an existing segment. It does not execute SQL, modify data, delete resources, or trigger financial transactions. It is analogous to inspecting a stored procedure definition rather than running it. The experimental status does not elevate the risk category.

From the tool's definition Tool retrieves the SQL statement for a parent segment using parent_segment_id parameter. Description indicates it 'Get[s] the SQL statement' - a read-only retrieval operation with no modification or execution of queries.

Documented attack patterns abuse exactly the kind of access parent_segment_sql gives an agent:

POLICY

How to control parent_segment_sql

PolicyLayer is an MCP gateway — it sits between your AI agents and Treasure Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for parent_segment_sql:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "parent_segment_sql": {}
  }
}

parent_segment_sql is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Treasure Data MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Treasure Data MCP Server tools

Destructive execute Execute write operations (UPDATE, DELETE, INSERT, etc.) when enable_updates=true Destructive kill_attempt Request cancellation of a running attempt Execute retry_attempt Retry a specific failed attempt with resume capabilities Execute retry_session Retry a failed session from the beginning or a specific task Write use_database Switch the current database context for subsequent queries Read current_database Get the current database context being used for queries Read describe_table Get column information for a specific table Read get_attempt_tasks List all tasks within an attempt with their execution status

All 23 Treasure Data MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about parent_segment_sql

What does the parent_segment_sql tool do? +

[EXPERIMENTAL] Get the SQL statement for a parent segment (audience). Requires parent_segment_id parameter. Use list_parent_segments first to find available parent segment IDs. It is categorised as a Read tool in the Treasure Data MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on parent_segment_sql? +

Register the Treasure Data MCP Server MCP server in PolicyLayer and add a rule for parent_segment_sql: 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 Treasure Data MCP Server. Nothing to install.

What risk level is parent_segment_sql? +

parent_segment_sql is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit parent_segment_sql? +

Yes. Add a rate_limit block to the parent_segment_sql 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.

How do I block parent_segment_sql completely? +

Set action: deny in the PolicyLayer policy for parent_segment_sql. 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 parent_segment_sql? +

parent_segment_sql is provided by the Treasure Data MCP Server MCP server (treasure-data/td-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Treasure Data MCP Server tool call.

Start from Treasure Data MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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23 Treasure Data MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.