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gensecaihq

pfSense MCP Server

by gensecaihq

create_dns_access_list

Create DNS Resolver access list entries to permit or deny DNS queries from specific networks, with optional immediate activation.

Instructions

Create a DNS Resolver access list entry

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
descrNoOptional description
aclnameYesName of the access list
networksNoList of network dicts, each with "network" and "mask" keys (e.g., [{"network": "192.168.1.0", "mask": 24}])
aclactionYesAction (allow, deny, refuse, allow_snoop, deny_nonlocal, refuse_nonlocal)
apply_immediatelyNoWhether to apply changes immediately

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

Annotations already mark the tool as non-read-only and non-destructive, but the description adds no behavioral context beyond the word "Create." It does not disclose effects like immediate application, relationship to the DNS resolver configuration, or any side effects of creating an entry.

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, front-loaded sentence that immediately states the action and target. It contains no filler, repetition, or unnecessary detail.

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

Completeness3/5

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

With full schema coverage and an output schema present, the description does not need to explain return values or parameter formats. However, it omits operational context such as the role of apply_immediately or how this interacts with apply_dns_resolver_changes, making it only minimally complete for real-world use.

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 the schema already documents all parameters including aclname, aclaction, networks, descr, and apply_immediately. The description itself adds no parameter-level meaning, so the baseline of 3 applies.

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 uses the specific verb "Create" and identifies the exact resource "DNS Resolver access list entry," which clearly distinguishes this from sibling update/delete/search_dns_access_lists operations. It conveys the unit of work (an entry) rather than just the broad resource category.

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?

Usage is only implied by the verb "Create" and the resource name; there is no explicit statement of when to use this tool versus alternatives such as update_dns_access_list or delete_dns_access_list. It also does not mention any prerequisites or whether apply_dns_resolver_changes is needed afterwards.

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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