rebalance-table · StarTree MCP Server for Apache Pinot MCP

WHAT IT DOES

What rebalance-table does on StarTree MCP Server for Apache Pinot

AI agents invoke rebalance-table to trigger actions in StarTree MCP Server for Apache Pinot. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

THE RISK

High Risk

Why rebalance-table needs a policy

Rebalancing a table involves reassigning instances and segments across the cluster, which is an operational action that triggers external operations and can significantly impact cluster performance and data availability. It is not a simple read or write, but an execution of a complex operational procedure.

From the tool's definition Rebalances a table (reassign instances and segments)

Documented attack patterns abuse exactly the kind of access rebalance-table gives an agent:

POLICY

How to control rebalance-table

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 rebalance-table:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "rebalance-table": {
      "limits": [
        {
          "counter": "rebalance-table_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

rebalance-table stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. 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.

RATE-LIMIT 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 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 Write add-index Adds a specified index type to one or more columns in a table

All 26 StarTree MCP Server for Apache Pinot tools →

Execute tools on other servers

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Go deeper

High-risk tools in StarTree MCP Server for Apache Pinot → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about rebalance-table

What does the rebalance-table tool do? +

Rebalances a table (reassign instances and segments). It is categorised as a Execute tool in the StarTree MCP Server for Apache Pinot MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on rebalance-table? +

Register the StarTree MCP Server for Apache Pinot MCP server in PolicyLayer and add a rule for rebalance-table: 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 rebalance-table? +

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

Can I rate-limit rebalance-table? +

Yes. Add a rate_limit block to the rebalance-table 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 rebalance-table completely? +

Set action: deny in the PolicyLayer policy for rebalance-table. 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 rebalance-table? +

rebalance-table 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.