briefing

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

No annotations are provided, so the description carries the full burden. It does disclose the composition of returned data (calendar, reminders, note titles, conversation starters), which is genuinely useful behavioral context, but it says nothing about permission requirements, freshness/recency windows (how recent is 'recent'?), or whether the call has any side effects.

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?

A single front-loaded sentence-fragment that enumerates outputs in priority order with zero filler. Every clause earns its place.

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?

With no output schema and no annotations, the description must convey what comes back, and it does so by listing the four content sections. It's adequate for a zero-required-parameter read tool, though the absence of any indication of return shape or data freshness leaves a small gap.

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 coverage is 100% with a single optional enum parameter ('operation': 'today') fully documented in the schema. The description adds nothing about the parameter, but the schema already does the work, so baseline 3 applies.

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 names a concrete composited output: today's calendar, due reminders, recent note titles, and conversation starters. It's clear what the tool produces, and the enumerated sections implicitly map to the calendar/notes/reminders siblings, but it never explicitly states that this is a composite that replaces calling those siblings separately.

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?

'One-shot day briefing' hints that this is the single-call alternative to hitting calendar, reminders, and notes individually, but no explicit when-to-use or when-not-to-use guidance is given. An agent must infer the routing decision from the word 'one-shot' and the content list.

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