list_bases

THE RISK

Low Risk

Why list_bases needs a policy

This tool performs a read-only operation to enumerate bases within a space. It has no side effects, does not modify or delete data, and does not execute arbitrary code. It is purely informational retrieval, fitting the Read category with low severity due to minimal blast radius if misused by an AI agent.

From the tool's definition Tool name 'list_bases' and description 'List bases in a specific space' indicate a query operation that retrieves metadata about database bases without modifying or deleting any data.

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

POLICY

How to control list_bases

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

policy.json

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

list_bases 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 Teable MCP Server — 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

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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 list_bases

What does the list_bases tool do? +

List bases in a specific space. It is categorised as a Read tool in the Teable MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_bases? +

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

What risk level is list_bases? +

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

Can I rate-limit list_bases? +

Yes. Add a rate_limit block to the list_bases 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_bases completely? +

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

list_bases is provided by the Teable MCP Server MCP server (ltphat2204/teable-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Teable MCP Server tool call.

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

CHECK YOUR STACK →