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AIWerk

mcp-server-smallinvoice

by AIWerk

create_service_category

Create a new service category for invoicing and accounting. Specify a name and optional accounting account number to organize services.

Instructions

Creates new service category

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesName
accounting_account_numberNoAccounting account number
Behavior2/5

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

Annotations already declare readOnlyHint=false and destructiveHint=false, indicating a non-read, non-destructive mutation. The description adds no extra behavioral traits, such as permission requirements, duplicate handling, or side effects, offering minimal additional value.

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 a single, concise sentence with no wasted words. It is front-loaded and efficient, though it could benefit from a bit more context without sacrificing brevity.

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 simple create tool with two parameters and no output schema, the description is adequate but incomplete. It does not mention the return value or confirmation behavior, which could be helpful for an agent executing the tool.

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 both parameters having descriptions. The tool description does not add any extra meaning beyond the schema, such as clarifying the role of each parameter. Given high coverage, a baseline of 3 is appropriate.

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 'Creates new service category' uses a specific verb and resource, clearly distinguishing it from siblings like 'create_product_category' or 'create_service'. However, it lacks elaboration on the purpose of a service category, which could further enhance clarity.

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

Usage Guidelines2/5

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

No usage guidelines are provided. The description does not indicate when to use this tool versus alternatives, nor does it mention prerequisites or context. This leaves the agent without guidance on proper invocation.

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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