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io.github.antonio-mello-ai/mcp-pfsense

add_dhcp_static_mapping

Assign a static IP address to a device by its MAC address on a specified interface. Creates a DHCP reservation with optional hostname and description.

Instructions

Create a DHCP static mapping (IP reservation) for a MAC address.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
interfaceYes
macYes
ipaddrYes
hostnameNo
descrNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

No annotations provided, and the description does not disclose behavioral traits like whether it overwrites existing mappings, requires specific permissions, or handles conflicts. The burden falls entirely on the description, which fails to provide this context.

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

Conciseness3/5

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

The description is concise (one sentence) but lacks critical information, making it insufficient for tool selection. It is front-loaded but under-specified.

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 the tool's complexity (5 parameters, 3 required) and no annotations, the description should provide more context about input validation, side effects, and output. It fails to cover these, leaving the agent underinformed.

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

Parameters1/5

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

Schema description coverage is 0%, and the description does not explain any of the five parameters (interface, mac, ipaddr, hostname, descr). It only vaguely references 'MAC address', leaving the agent without semantic understanding of required fields.

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 action ('Create'), the resource ('DHCP static mapping'), and the context ('IP reservation for a MAC address'). It effectively distinguishes from sibling tools like add_dns_host_override.

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 on when to use this tool versus alternatives, such as list_dhcp_static_mappings or delete_dhcp_static_mapping. There are no prerequisites, exclusions, or context for usage.

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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