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jaydenk

Fantastical MCP

by jaydenk

get_event

Retrieve full details of a specific calendar event by providing its unique ID. Access event information for further processing or display.

Instructions

Get full details for a specific event by its ID.

Args: event_id: The event ID (shown in parentheses in event listings).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
event_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description must disclose behavioral traits. It only states it 'gets' details, implying a read operation, but does not mention any side effects, authentication requirements, rate limits, or constraints. This lacks transparency for an unannotated tool.

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?

The description is extremely concise: one sentence for the tool purpose and one line for the parameter. Every word is useful and there is no redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with one parameter and an output schema (so return values are documented elsewhere), the description is nearly complete. It explains the purpose and the parameter source. Minor gaps: no mention of error handling or required permissions, but acceptable given the simplicity.

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

Parameters4/5

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

The input schema has one parameter (event_id) with 0% description coverage. The description adds context: 'The event ID (shown in parentheses in event listings).' This tells the agent where to find the ID, which is helpful 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 the tool's function: 'Get full details for a specific event by its ID.' This is a specific verb-resource pair, and it distinguishes from sibling tools like get_events_by_calendar or search_events.

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 description implies when to use (when you have a specific event ID) via the parameter hint, but does not explicitly state when not to use it or compare with alternatives like get_events_in_range or search_events.

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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