# create_table

Create a new table in the specified instance.

Agent View of the PolicyLayer registry record for `create_table`. HTML page: https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/create-table

## Facts

- Tool: `create_table`
- Server: Mcp (`https://bigtableadmin.googleapis.com/mcp`) — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp.md
- Homepage: https://github.com/https://bigtableadmin.googleapis.com/mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 4 (3 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `tableId` | string | yes | Required. The ID to be used when referring to the new table within its instance, e.g., just `mytable`. |
| `projectId` | string | yes | Required. The project ID (e.g., "my-project"). If not known from the context, the Agent should attempt to get the current project ID from the gcloud config by r |
| `instanceId` | string | yes | Required. The instance ID within the project where the table will be created (e.g., "my-instance"). |
| `columnFamilies` | array | no | Optional. The names of the column families to be created in the table. Example: `["cf1", "cf2"]`. The tool mapping will apply a default garbage collection polic |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "create_table",
    "arguments": {
      "tableId": "<tableId>",
      "projectId": "<projectId>",
      "instanceId": "<instanceId>"
    }
  }
}
```

## Why create_table is rated Medium

This tool creates new data structures (tables) in Google Bigtable, which is a reversible write operation. While it modifies the database schema, it does not execute arbitrary code, delete data, or move money. Severity is medium because creating tables can consume resources and affect application behavior, but the operation is reversible via the sibling delete_table tool.

From the tool's own definition: "Tool name 'create_table' and description 'Create a new table in the specified instance' indicate data creation."

## Use case

AI agents use create_table to create or update resources in Mcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Mcp:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_table": {
      "limits": [
        {
          "counter": "create_table_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Mcp (13)

- `delete_instance` — Destructive — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/delete-instance.md
- `delete_logical_view` — Destructive — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/delete-logical-view.md
- `delete_table` — Destructive — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/delete-table.md
- `get_instance` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/get-instance.md
- `get_logical_view` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/get-logical-view.md
- `get_table` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/get-table.md
- `list_hot_tablets` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/list-hot-tablets.md
- `list_instances` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/list-instances.md
- `list_logical_views` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/list-logical-views.md
- `list_tables` — Read — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/list-tables.md
- `create_instance` — Write — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/create-instance.md
- `create_logical_view` — Write — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/create-logical-view.md
- `update_logical_view` — Write — https://policylayer.com/tools/com-googleapis-bigtableadmin-mcp/update-logical-view.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-googleapis-bigtableadmin-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-googleapis-bigtableadmin-mcp