segment_list · StarTree MCP Server for Apache Pinot MCP

WHAT IT DOES

What segment_list does on StarTree MCP Server for Apache Pinot

AI agents call segment_list to retrieve information from StarTree MCP Server for Apache Pinot 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 segment_list needs a policy

This tool queries and returns information about table segments without modifying, executing, or deleting any data. It is a straightforward read operation with minimal risk of unintended consequences if misused by an AI agent.

From the tool's definition Tool name 'segment_list' and description 'List segments for a table' indicate data retrieval with no side effects. The verb 'list' is a classic read-only operation.

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

POLICY

How to control segment_list

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

policy.json

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

segment_list 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 StarTree MCP Server for Apache Pinot — 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

More StarTree MCP Server for Apache Pinot tools

Destructive reset-table-segments Resets segments for a table (disable->wait->enable). Use Execute force_commit Force commit the current consuming segments Execute pause_consumption Pause consumption of a realtime table Execute read_query Execute a SELECT query on the Pinot database Execute rebalance-table Rebalances a table (reassign instances and segments) Execute reload_table_filters reload_table_filters Execute reload-table-segments Reload all segments for a table (applies config changes, can Execute resume_consumption Resume consumption of a realtime table

All 26 StarTree MCP Server for Apache Pinot tools →

Read tools on other servers

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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 segment_list

What does the segment_list tool do? +

List segments for a table. It is categorised as a Read tool in the StarTree MCP Server for Apache Pinot MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on segment_list? +

Register the StarTree MCP Server for Apache Pinot MCP server in PolicyLayer and add a rule for segment_list: 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 StarTree MCP Server for Apache Pinot. Nothing to install.

What risk level is segment_list? +

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

Can I rate-limit segment_list? +

Yes. Add a rate_limit block to the segment_list 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 segment_list completely? +

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

segment_list is provided by the StarTree MCP Server for Apache Pinot MCP server (startreedata/mcp-pinot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every StarTree MCP Server for Apache Pinot tool call.

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

CHECK YOUR STACK →

Free to start. No card required.

26 StarTree MCP Server for Apache Pinot tools catalogued and risk-classified — across an index of 43,000+ MCP servers.