list_storage_buckets

A read tool on the Supabase MCP Server - Self-Hosted Edition MCP server.

SERVERSupabase MCP Server - Self-Hosted Edition SOURCEabdqum/supabase-mcp-selfhosted

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/abdqum-supabase-mcp-selfhosted/list-storage-buckets.md

WHAT IT DOES

What list_storage_buckets does on Supabase MCP Server - Self-Hosted Edition

AI agents call list_storage_buckets to retrieve information from Supabase MCP Server - Self-Hosted Edition without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_storage_buckets is rated Low

List operations are read-only queries that retrieve information about existing resources. Listing storage buckets returns metadata about available buckets but does not create, modify, delete, or execute any operations. This presents minimal risk—at worst, an AI agent learns about bucket names and configuration. No data is modified, no code is executed, and no deletion occurs.

From the tool's definition Tool name 'list_storage_buckets' indicates a listing/querying operation. The description is empty, but the name and context (Supabase storage management) suggest retrieval of bucket metadata without modification or deletion.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_storage_buckets safely

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

list_storage_buckets Allowed

list_storage_buckets 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_storage_buckets": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Supabase MCP Server - Self-Hosted Edition, apply this rule, and every list_storage_buckets call is checked against it from then on.

FAQ

Questions about list_storage_buckets

What does the list_storage_buckets tool do? +

list_storage_buckets is a read tool on the Supabase MCP Server - Self-Hosted Edition MCP server. It is categorised as a Read tool in the Supabase MCP Server - Self-Hosted Edition MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_storage_buckets? +

Register the Supabase MCP Server - Self-Hosted Edition MCP server in PolicyLayer and add a rule for list_storage_buckets: 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 Supabase MCP Server - Self-Hosted Edition. Nothing to install.

What risk level is list_storage_buckets? +

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

Can I rate-limit list_storage_buckets? +

Yes. Add a rate_limit block to the list_storage_buckets 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_storage_buckets completely? +

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

list_storage_buckets is provided by the Supabase MCP Server - Self-Hosted Edition MCP server (abdqum/supabase-mcp-selfhosted). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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