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sonisoft-cnanda

now-sdk-ext-mcp

Get Catalog Item Details

get_catalog_item
Read-only

Retrieve a ServiceNow catalog item's details and variables by sys_id to see required form fields and understand what it offers before submitting a request.

Instructions

Get details of a specific service catalog item by sys_id, optionally including its variables (form fields). Use this to understand what a catalog item offers and what information is needed before submitting a request.

Set include_variables to true (default) to also retrieve the item's form fields.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sys_idYesThe sys_id of the catalog item.
instanceNoThe ServiceNow instance auth alias to use. This is the alias configured via `now-sdk auth --add` (e.g., "myinstance", "prod", "test"). The user will typically refer to this by name when saying things like "on my myinstance instance". If not provided, falls back to the SN_AUTH_ALIAS environment variable.
include_variablesNoWhether to include the item's variables/form fields (default true).
Behavior4/5

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

Annotations declare readOnlyHint=true, which covers the safety profile. The description adds valuable behavioral context about the optional 'include_variables' parameter and its default behavior, explaining that it retrieves form fields. This goes beyond what annotations provide.

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 brief and front-loaded. The first sentence states the core purpose, and the second provides a useful usage hint. No wasted 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?

For a simple read operation with no output schema, the description is adequate. It covers the main purpose, optional variables, and usage context. It doesn't discuss error cases or return formats, but those aren't critical for this tool's simplicity.

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%, with each parameter already well-documented. The description reinforces the 'include_variables' default but adds no new meaning beyond what's in the schema. Baseline 3 is appropriate since the schema carries the semantic burden.

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's function: 'Get details of a specific service catalog item by sys_id, optionally including its variables.' This specific verb+resource combination distinguishes it from sibling tools like 'list_catalog_items' and 'list_catalog_item_variables'.

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

Usage Guidelines4/5

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

The description provides clear context for when to use the tool: 'Use this to understand what a catalog item offers and what information is needed before submitting a request.' While it doesn't explicitly exclude alternatives, this guidance is sufficient for an agent to decide when it's appropriate.

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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