daily_brief

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

No annotations are present, so the description must carry the full burden. It fails to disclose whether the tool is read-only, what side effects occur, or how the briefing is generated. The term 'briefing' is ambiguous and could imply mutations.

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 short (4 words) and front-loaded, but it is under-specified. While concise, it sacrifices clarity; a slightly longer description with behavioral details would be more effective.

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 no output schema and no annotations, the description is critically incomplete. It does not explain what data is returned, in what format, or how the 'briefing' is structured, leaving an AI agent without sufficient information to use the tool correctly.

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?

There are no parameters, and schema description coverage is 100% (trivially). The description lists the data sources (calendar, reminders, inbox), which adds some meaning beyond the empty schema. However, it does not specify any configuration options.

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 'Morning briefing: calendar, reminders, inbox' vaguely indicates the tool aggregates information from these three sources, but the exact action (list, summarize, etc.) is unclear. Sibling tools like list_calendar_events are more explicit.

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 is provided on when to use this tool versus alternatives such as calling individual list tools or other briefing tools. The description does not mention context, prerequisites, or exclusions.

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