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itunified-io

mcp-opnsense

by itunified-io

opnsense_dhcp_list_static

List all static DHCP mappings (MAC-to-IP reservations) from your OPNsense firewall, supporting both Kea and ISC DHCP backends with auto-detection.

Instructions

List all static DHCP mappings (MAC-to-IP reservations). Supports both Kea DHCP and ISC DHCP (legacy) backends — auto-detected.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

With no annotations, the description carries full burden. It explains the tool lists all static mappings and auto-detects backends, but does not disclose permissions needed, whether it reads from config or runtime, or the output format. Basic but adequate for a simple list operation.

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?

The description is a single concise sentence that states the purpose and adds backend support information without any redundant or unnecessary words.

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

Completeness4/5

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

Given no parameters and no output schema, the description is fairly complete for a list tool. It could mention the structure of the returned list, but for a straightforward tool it is adequate.

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 input schema has no parameters (100% coverage), so the description adds no parameter-specific information, which is appropriate. A baseline of 4 is justified for zero-parameter tools.

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 lists static DHCP mappings (MAC-to-IP reservations) and specifies support for both Kea and ISC DHCP backends. It distinguishes itself from siblings like opnsense_dhcp_list_leases (dynamic leases) and opnsense_dhcp_add_static (adding mappings).

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

Usage Guidelines3/5

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

The description does not explicitly state when to use this tool versus alternatives like opnsense_dhcp_list_leases or opnsense_dhcp_add_static. While it mentions backend support, it lacks guidance on prerequisites or when not to use it.

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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