create_calendar_event

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

The description discloses the required date-time format and timezone ('VN Time'), which is a behavioral detail. However, without annotations, it fails to mention other behaviors like event creation limits, recurrence, or error handling.

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 very concise (two sentences) and front-loaded with the purpose. However, it could be more informative without expanding much.

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?

Given no output schema and low schema description coverage, the description is incomplete. It does not specify return values, error scenarios, or prerequisites like authentication, leaving the agent with gaps.

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?

With 0% schema parameter coverage, the description must compensate. It only hints at the time format for start_time and end_time but does not explain summary, description, or that description is optional. Lacks sufficient meaning for an agent.

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 clearly states the verb 'Create' and resource 'calendar event', indicating the tool's purpose. However, it does not differentiate from sibling tools like list_calendar_events or provide context on which calendar is used.

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?

No guidance on when to use this tool versus alternatives (e.g., list_calendar_events for reading). The description lacks any usage context or prerequisites.

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