list_objects

A read tool on the Aos MCP server.

SERVERAos SOURCE@hybridlabor-api/aos

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/hybridlabor-api-aos/list-objects.md

WHAT IT DOES

What list_objects does on Aos

AI agents call list_objects to retrieve information from Aos 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_objects is rated Low

List operations retrieve and enumerate existing data without modification or side effects. The empty description reduces confidence slightly, but the naming pattern and sibling tools strongly suggest a read-only listing operation consistent with AWS S3's ListObjects API.

From the tool's definition Tool name is 'list_objects' paired with sibling tools 'list_buckets', 'list_tables', 'list_db_instances', 'list_db_engine_versions' which are clearly Read operations. The pattern indicates this lists AWS S3 objects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_objects safely

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

list_objects Allowed

list_objects 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_objects": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Aos, apply this rule, and every list_objects call is checked against it from then on.

FAQ

Questions about list_objects

What does the list_objects tool do? +

list_objects is a read tool on the Aos MCP server. It is categorised as a Read tool in the Aos MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_objects? +

Register the Aos MCP server in PolicyLayer and add a rule for list_objects: 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 Aos. Nothing to install.

What risk level is list_objects? +

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

Can I rate-limit list_objects? +

Yes. Add a rate_limit block to the list_objects 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_objects completely? +

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

list_objects is provided by the Aos MCP server (@hybridlabor-api/aos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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