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lazyants

lexware-mcp-server

by lazyants

Create Event Subscription

lexware_create_event_subscription

Create webhook event subscriptions in Lexware to receive notifications for changes, deletions, and creations across contacts, invoices, vouchers, and more.

Instructions

Create a new webhook event subscription in Lexware.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
eventTypeYesEvent type. Documented values: contact.changed, contact.deleted, voucher.created, voucher.changed, voucher.deleted, invoice.created, invoice.changed, invoice.deleted, credit-note.created, credit-note.changed, credit-note.deleted, quotation.created, quotation.changed, quotation.deleted, delivery-note.status.changed, order-confirmation.status.changed. Lexware may add new types — pass any documented value.
callbackUrlYesWebhook URL

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv3.0.0

TDQS

B3/5.0
Behavior2/5

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

Annotations already indicate this is a write operation (readOnlyHint=false) and not idempotent (idempotentHint=false). The description adds no additional behavioral context (e.g., whether duplicate creations fail, authentication requirements, or side effects).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence that is correctly front-loaded with the action. However, it is extremely minimal and provides no structural elements like separate sections or examples.

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?

Given no output schema, the description should explain the response or success behavior (e.g., returns the subscription ID). It also does not leverage the openWorldHint annotation to clarify that new event types may be valid. The description is incomplete for a creation 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?

The input schema has 100% description coverage for both parameters. The description simply restates the tool purpose and does not provide additional meaning or examples beyond the schema.

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 a specific action ('Create a new webhook event subscription') and resource ('event subscription in Lexware'). It distinguishes from sibling tools like lexware_list_event_subscriptions, lexware_get_event_subscription, and lexware_delete_event_subscription.

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 is provided on when to use this tool versus alternatives (e.g., listing or deleting subscriptions). The description does not mention any prerequisites or exclusions.

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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