list_hot_tablets

SERVERMcp SOURCEhttps://bigtableadmin.googleapis.com/mcp

Low RISK CLASS

Category Read

Parameters 73 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-googleapis-bigtableadmin-mcp/list-hot-tablets.md

WHAT IT DOES

What list_hot_tablets does on Mcp

AI agents call list_hot_tablets to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`endTime`	string	—	Optional. The end time to list hot tablets. End time defaults to Now - 24 hours if it is unset. The end time should be greater than the start time, and the maxi
`pageSize`	integer	—	Optional. Maximum number of results per page.
`clusterId`	string	Yes	Required. The cluster ID within the instance (e.g., "my-cluster").
`pageToken`	string	—	Optional. The value of `next_page_token` returned by a previous call.
`projectId`	string	Yes	Required. The project ID (e.g., "my-project").
`startTime`	string	—	Optional. The start time to list hot tablets. The hot tablets in the response will have start times between the requested start time and end time. Start time de
`instanceId`	string	Yes	Required. The instance ID within the project (e.g., "my-instance").

Parameters from the server's own tool schema.

RISK

Why list_hot_tablets is rated Low

Even though list_hot_tablets only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_hot_tablets safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_hot_tablets, this is the rule to start with:

list_hot_tablets Allowed

list_hot_tablets is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every list_hot_tablets call is checked against it from then on.

FAQ

Questions about list_hot_tablets

What does the list_hot_tablets tool do? +

Lists hot tablets in a Cloud Bigtable cluster. Start time defaults to Now if it is unset, and end time defaults to Now - 24 hours if it is unset. The start time should be less than the end time, and the maximum allowed time range between start time and end time is 48 hours. Start time and end time should have values between Now and Now - 14 days. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

What parameters does list_hot_tablets accept? +

list_hot_tablets accepts 7 parameters: endTime, pageSize, clusterId, pageToken, projectId, startTime, instanceId. Required: clusterId, projectId, instanceId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on list_hot_tablets? +

Register the MCP server in PolicyLayer and add a rule for list_hot_tablets: 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 Mcp. Nothing to install.

What risk level is list_hot_tablets? +

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

Can I rate-limit list_hot_tablets? +

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

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

list_hot_tablets is provided by the MCP server (https://bigtableadmin.googleapis.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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