net-mcp

Local Interfaces

local_interfaces

Display local network interfaces with IP addresses, subnet masks, and status, without requiring admin privileges.

Instructions

Show network interfaces and their IP addresses on the local machine.

Returns interface names, IP addresses, subnet masks, and status. Uses ifconfig on macOS, ip addr on Linux, ipconfig on Windows. Does not require admin privileges.

Input Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Output Schema

TableJSON Schema

Name	Required	Description
`note`	No	Additional context about the result
`error`	No	Why the tool could not produce a result: input validation failure, tool disabled by configuration, binary not installed, or no service answered. Empty when the command executed.
`stderr`	Yes	Standard error of the command, or the failure message when the command did not run
`stdout`	Yes	Standard output of the command (curl output is capped at 10,000 characters)
`command`	Yes	The exact command line that was executed, or the tool name if the command never ran
`success`	Yes	True when the command ran and exited with status 0
`platform`	Yes	Operating system the command ran on (Darwin, Linux or Windows)
`returncode`	Yes	Process exit status. 0 = success; 2 = input rejected before running; 124 = timed out; 126 = disabled by config or permission denied; 127 = binary not found

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0Sep 22, 2026

TDQS

A4.5/5.0

Behavior4/5

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

With no annotations provided, the description carries the full disclosure burden. It usefully reveals OS-specific command usage (ifconfig, ip addr, ipconfig), the fact that it requires no admin privileges, and the kinds of data returned. It could additionally note read-only guarantees or edge cases, but for a simple interface-listing tool this is solid.

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

Conciseness5/5

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

Three tight sentences front-load the core purpose, then efficiently cover return values, platform behavior, and privileges. No filler or redundant wording.

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

Completeness5/5

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

This is a simple zero-parameter tool with an output schema available. The description covers what it returns, how it behaves on each OS, and its privilege requirements, so an agent has enough to invoke and interpret the result correctly.

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

Parameters4/5

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

The tool has zero parameters and the schema coverage is 100%, so there is no parameter meaning for the description to add. The baseline of 4 applies because no parameter documentation is needed.

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 the tool's action ('Show network interfaces') and its specific resource ('IP addresses on the local machine'). It also lists return values, making its purpose unmistakable and distinguishing it from remote-network sibling tools.

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

Usage Guidelines4/5

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

The description provides clear context by emphasizing 'local machine' and noting that no admin privileges are required, which helps an agent decide when this local-introspection tool is appropriate. It does not explicitly name alternatives or state when not to use it, but the context is strong enough to guide selection.

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