list_instances

List all Cloud SQL instances in the project.

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

Low RISK CLASS

Category Read

Parameters 50 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-googleapis-sqladmin-mcp/list-instances.md

WHAT IT DOES

What list_instances does on Mcp

AI agents call list_instances 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
`filter`	string	—	A filter expression that filters resources listed in the response. The expression is in the form of field:value. For example, 'instanceType:CLOUD_SQL_INSTANCE'.
`project`	string	—	Project ID of the project for which to list Cloud SQL instances.
`location`	string	—	Optional. Region of the Cloud SQL instance.
`pageToken`	string	—	A previously-returned page token representing part of the larger set of results to view.
`maxResults`	integer	—	The maximum number of instances to return. The service may return fewer than this value. If unspecified, at most 500 instances are returned. The maximum value i

Parameters from the server's own tool schema.

RISK

Why list_instances is rated Low

Even though list_instances 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_instances 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_instances, this is the rule to start with:

list_instances Allowed

list_instances 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_instances": {}
  }
}

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_instances call is checked against it from then on.

FAQ

Questions about list_instances

What does the list_instances tool do? +

List all Cloud SQL instances in the project. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

What parameters does list_instances accept? +

list_instances accepts 5 parameters: filter, project, location, pageToken, maxResults. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on list_instances? +

Register the MCP server in PolicyLayer and add a rule for list_instances: 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_instances? +

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

Can I rate-limit list_instances? +

Yes. Add a rate_limit block to the list_instances 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_instances completely? +

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

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

KEEP EXPLORING

More on , and thousands of servers like it.

This server

All 15 tools →

Across the catalogue

list_symbols on ACE-MCP →aiva_list_affiliates on AIVA MCP Server →list_circuits on 0gzk → The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →