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jschuller

ServiceNow MCP Server

by jschuller

list_update_set_changes

List all changes (customer updates) in an update set by providing its sys_id. Get a clear view of modifications included in a ServiceNow update set.

Instructions

List all customer updates (changes) within an update set

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoMaximum number of changes to return
update_set_sys_idYesThe sys_id of the update set

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

No annotations are provided, so the description carries the full burden. It does not explicitly state that this is a read-only operation, nor does it disclose that the 'all' is constrained by the 'limit' parameter (default 50). The description's claim of 'List all customer updates' is potentially misleading given the limit parameter, and no details about ordering, pagination, or permissions are given.

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?

A single, front-loaded sentence that directly captures the tool's purpose. There is no filler or repetition, making it highly concise and structured for quick scanning.

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?

The description is short but covers the core function. However, it omits critical context about the limit parameter affecting 'all' results, and it does not address whether the returned data includes only changes or also metadata. Given the output schema exists, return format is covered, but the scope of 'all' is ambiguous without noting the limit.

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 parameters are already well-documented. The description adds no additional parameter semantics beyond what the schema provides, such as clarifying the limit behavior or default value. Baseline of 3 applies because the schema does the heavy lifting.

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 verb 'List' and the resource 'customer updates (changes)' with scope 'within an update set'. It distinguishes this tool from siblings like list_update_sets (which lists update sets) and get_update_set (which retrieves a single update set).

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 context for use is implied: when you have an update_set_sys_id and want to see its changes. However, the description does not explicitly provide when-not-to-use guidance or mention alternative tools, such as get_update_set for metadata. It relies on the name and sibling differentiation.

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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