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OCI MCP Server

OCI MCP Server

by sarthak-pansare
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Hybrid

list_instance_vnics

Lists all VNIC attachments and public IPs for a specified instance in a compartment.

Instructions

List VNIC attachments (incl. public IP) for an instance.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "compartment_id": "<compartment_id>",
      "instance_id": "<instance_id>"
    },
    "name": "list_instance_vnics"
  }
}

Input Schema

NameRequiredDescriptionDefault
compartment_idYes
instance_idYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It states the tool lists attachments including public IP but omits behavioral details like read-only nature, required permissions, or potential pagination behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, concise sentence with no redundancy. However, it could include slightly more detail without compromising conciseness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema and no annotations, the description is incomplete. It lacks information on return format, error handling, pagination, or any constraints beyond the basic purpose.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It only implicitly covers instance_id via 'for an instance', but compartment_id is unexplained. Both parameters lack semantic context beyond their names.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it lists VNIC attachments for an instance, including public IP. It uses specific verb and resource, and distinguishes from sibling tools like list_instances or list_subnets which address different resources.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives, such as list_instances or other network-related tools. There is no mention of prerequisites or context for invocation.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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