Calendar Create Event

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

Annotations provide only openWorldHint=false, idempotentHint=false, and destructiveHint=false, but the description adds no behavioral context beyond that. It does not mention that creating an event is a side-effecting write, that it may require calendar permissions, or what happens on duplicate or conflicting events. No additional behavioral traits are disclosed.

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

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

The description is short, but it is under-specified rather than concise. Its only sentence is generic boilerplate that could apply to almost any Apple domain tool, so it does not earn its place. There is no functional content to structure or front-load.

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

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

For a tool with 8 parameters, including required ISO datetime strings, calendar_id, and recurrence, the description is completely inadequate. The presence of an output schema does not compensate for the total absence of behavioral, parameter, and usage guidance. An agent cannot reliably decide to invoke this tool from the description alone.

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

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

Schema description coverage is 0%, so the description must compensate by explaining parameter meanings, formats, or relationships. It does none of this. The parameter names like start_iso, end_iso, recurrence, and calendar_id are left entirely self-explanatory, and the description adds zero semantic value.

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

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

The description merely restates the tool name and title ('calendar_create_event' / 'Calendar Create Event') and adds only the boilerplate phrase 'Delegated Apple domain tool ... exposed through Apple-Tools-MCP.' It does not state what the tool does—that it creates a calendar event—nor does it distinguish itself from close siblings like calendar_update_event or calendar_delete_event.

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

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

The description gives no guidance on when to use calendar_create_event versus alternatives such as calendar_update_event, calendar_delete_event, or calendar_list_events. No prerequisites, exclusions, or alternative selection criteria are provided. An agent must infer all usage context from the name and schema alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.