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AIWerk

mcp-server-smallinvoice

by AIWerk

update_service

Modify existing service details such as name, price, description, and vat in the Smallinvoice system.

Instructions

Updates specified service

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
service_idYesservice ID
numberNoNumber
nameNoName
descriptionNoDescription
notesNoNotes
category_idNoCategory id
including_vatNoIncluding vat
vatNoVat
unit_idNoUnit id
priceNoPrice
default_amountNoDefault amount
custom_fieldsNocustom fields values
Behavior2/5

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

Annotations already indicate write operation (readOnlyHint=false) and non-destructive (destructiveHint=false). Description does not add beyond 'updates' - lacks details on partial vs full update, side effects, or required permissions.

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: 3 words, no redundancy. Every word earns its place. Structure is appropriate for a tool where schema carries most details.

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?

Despite schema coverage, the description omits update behavior (merge vs replace), return value (no output schema), and openWorldHint implications. Lacks context for a 12-parameter 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 coverage is 100%, so the schema documents all parameters. Description adds no extra meaning beyond what the schema provides.

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 clearly states the verb ('Updates') and resource ('specified service'), matching the tool name. It is concise and unambiguous, though it does not differentiate from sibling update tools further than the resource name.

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 guidance on when to use vs alternatives (e.g., create_service, delete_services) or prerequisites. The description provides no context for decision-making.

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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