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jshsakura

mfa-servicenow-mcp

by jshsakura

sn_query

Perform generic table queries in ServiceNow when domain-specific tools don't apply. Supports filters, pagination, field selection, and reference field resolution.

Instructions

Generic table query — last resort. Prefer domain tools: search_server_code, manage_workflow, manage_flow_designer.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNo
queryNo
tableNo
fieldsNo
offsetNo
orderbyNoOrder by field, supports -field for desc
display_valueNoResolve reference fields to display labels. Slower; opt-in only.
include_countNo
Behavior2/5

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

No annotations are provided, and the description does not disclose behavioral traits such as read-only nature, performance implications, or side effects. A query tool likely reads data, but this is not confirmed.

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?

Extremely concise: two sentences that front-load the purpose and usage guidelines. No unnecessary words.

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?

With 8 parameters, no output schema, and no annotations, the description is insufficient. It lacks details on how to construct queries, pagination, return format, or parameter usage, which are critical for correct invocation.

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

Parameters2/5

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

Schema description coverage is low (25%). The description adds no parameter explanations beyond what the schema partially provides. It does not compensate for the missing parameter descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Generic table query — last resort' specifies the verb (query) and resource (table), and distinguishes from sibling domain tools. It is clear but could be more explicit about the context of 'table'.

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

Usage Guidelines5/5

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

Explicitly states 'last resort' and directs users to prefer domain tools like search_server_code, manage_workflow, manage_flow_designer, providing clear when-to-use and alternatives.

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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