Manage Focus Time

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

Annotations already declare destructive and non-read-only behavior, so the description adds valuable context by disclosing key side effects: auto-declining meeting invitations and setting chat status to Do Not Disturb by default. This goes beyond the structured annotations without contradicting them.

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 two sentences, front-loaded with the verb and resource, and every word earns its place. It is concise and structured effectively.

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 16-parameter tool, the description is brief but sufficient because the schema carries detailed parameter semantics and the output schema is present. It explains the purpose and key side effects, making it complete enough for an agent to understand what the tool does, though it does not enumerate the CRUD actions (already in the action parameter schema).

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?

The input schema has 100% parameter description coverage, so the baseline is 3. The description does not add parameter-specific details beyond what the schema provides, though it does mention defaults behavior that maps to chat_status and auto_decline_mode. This adds some context but does not compensate for anything missing in the schema.

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 tool 'Manages Focus Time events on Google Calendar' and distinguishes these special events from regular calendar events by mentioning they auto-decline meeting invitations and set chat status to Do Not Disturb. This differentiates it from sibling tools like manage_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 clear context that this tool is for Focus Time events, which are distinct from regular events due to their auto-decline and DND behaviors. It implies when to use this tool, though it does not explicitly name alternatives or state when not to use it.

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