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Create Ip_range

netbox_create_ip_range

Create a new IP range in NetBox by providing start and end addresses, with optional VRF, role, tags, status, and custom fields.

Instructions

Create a new ip_range in NetBox.

This adds a new row to NetBox. Ask before calling if the user wanted a dry-run.

Returns: Markdown summary of the newly created object (default) or JSON with the full NetBox response.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
vrfNoVRF id; omit for the global table.
roleNoIPAM role id.
tagsNoOptional array of tag slugs to apply to the object.
statusNoactive
tenantNo
commentsNo
descriptionNo
end_addressYesLast address with mask, e.g. '10.0.0.20/24' (required).
custom_fieldsNoOptional object of custom-field slugs -> values. Only include fields defined on your NetBox instance.
mark_utilizedNoTreat the entire range as fully utilized.
start_addressYesFirst address with mask, e.g. '10.0.0.10/24' (required).
response_formatNoOutput format: 'markdown' (default, human-readable) or 'json' (full structured payload). Use 'json' when chaining follow-up tool calls.markdown
Behavior4/5

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

The description discloses that the tool performs a write operation (consistent with readOnlyHint=false) and specifies the return format (Markdown by default or JSON). It also advises asking about dry-runs, adding context beyond the annotations. No contradictions with annotations.

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 short (3 sentences) and front-loaded with the main purpose. It includes essential behavioral notes without extraneous content. It could be slightly more structured but is efficient.

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?

For a tool with 12 parameters and no output schema, the description is relatively minimal. It covers the return format but does not explain the relationship to other NetBox tools or provide context on when to use it over similar tools. It is adequate but not thorough.

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 coverage is 67% (high), so the schema already describes parameters adequately. The description does not add additional semantics for parameters, but the baseline is 3. No parameter information is missing from the description.

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 'Create a new ip_range in NetBox', which is a specific verb and resource. It also explains that it adds a new row. This distinguishes it from other sibling tools that create different objects.

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 includes a guideline to ask before calling if a dry-run is desired, which is a useful caution. However, it does not provide explicit when-to-use or when-not-to-use advice, nor does it contrast with alternative tools like netbox_create_prefix or netbox_create_ip_address.

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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