xano_create_btree_index · Xano MCP Server MCP: Risk & Policy

WHAT IT DOES

What xano_create_btree_index does on Xano MCP Server

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

WHY IT NEEDS A POLICY

Why xano_create_btree_index needs a policy

Creating a B-tree index is a reversible Write operation—it modifies database schema/metadata but does not delete or execute arbitrary code. Index creation typically improves query performance and can be dropped. The empty description limits confidence, but the name and context with schema manipulation tools justify Write category.

From the tool's definition Tool name is 'xano_create_btree_index' and description is empty. Based on naming convention, this creates a B-tree index on a database schema, which is a schema modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xano_create_btree_index Rate-limited

xano_create_btree_index stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "xano_create_btree_index": {
      "limits": [
        {
          "counter": "xano_create_btree_index_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Xano MCP Server, so you can run agents against it safely.

FAQ

Questions about xano_create_btree_index

What does the xano_create_btree_index tool do? +

xano_create_btree_index. It is categorised as a Write tool in the Xano MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on xano_create_btree_index? +

Register the Xano MCP Server MCP server in PolicyLayer and add a rule for xano_create_btree_index: 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 Xano MCP Server. Nothing to install.

What risk level is xano_create_btree_index? +

xano_create_btree_index is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit xano_create_btree_index? +

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

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

xano_create_btree_index is provided by the Xano MCP Server MCP server (roboulos/simple-xano-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.