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coreyhines

coreyhines/opnsense-mcp

by coreyhines

arp

Shows the ARP/NDP neighbor table to resolve IP-to-MAC mappings. Filter by IP, MAC, or search by hostname to identify network devices.

Instructions

Show ARP/NDP table

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ipNoFilter by IP address
macNoFilter by MAC address
searchNoTargeted search by IP/MAC/hostname

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changedv1.0.0
    • removedInput schema / properties / ip / optional
      Removed value: -true
    • removedInput schema / properties / mac / optional
      Removed value: -true
    • removedInput schema / properties / search / optional
      Removed value: -true
  2. First observedv1.8.0

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states 'Show', implying a read-only operation, but does not explicitly confirm safety, describe output format, or mention any side effects or prerequisites. This is minimal disclosure for a tool with no annotation support.

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 filler or redundant details. It is appropriately sized for a simple show command and front-loads the core purpose effectively.

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?

The tool has no output schema and no annotations, yet the description provides only the barest functionality statement. It does not explain what the returned table looks like, how filters behave, or any limitations. For a tool with filters, this is incomplete context.

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

Parameters3/5

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

Schema description coverage is 100%, so all three parameters (ip, mac, search) are already documented in the schema. The description adds no extra meaning about these filters, such as syntax or interaction between them, so it stays at the baseline score of 3.

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

Purpose4/5

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

The description states a clear action ('Show') and a specific resource ('ARP/NDP table'), which is distinct from the sibling tools. It is not a tautology and communicates the tool's core function immediately, though it does not explicitly contrast with siblings like 'diagnostics' or 'ipv6'.

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?

The description provides no guidance on when to use this tool versus alternatives. It does not mention any conditions, use cases, or exclusions, leaving the agent to infer from the name alone.

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