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

Annotations already cover the read-only/idempotent safety profile, so the description's added value is the default window ('from now on'), the sort order ('soonest first'), and the payload contents (hosts, guests, confirmation call). One weakness: the trailing 'Free' is unexplained and the default exclusion of cancelled bookings is never 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?

Three compact, front-loaded sentences with no filler; the core scope appears in the first clause. The single trailing word 'Free' is ambiguous and earns little.

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, the description does well to name the returned fields, but a six-parameter list tool with a status enum and a limit cap should disclose the default status and pagination limit. Missing that, the definition is adequate but has clear 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?

Schema description coverage is only 17%, so the description must carry parameter meaning and it largely does not. It explains `from`/`to` defaults and `person`, but leaves `limit`, `meeting_type`, and critically `status` (default 'scheduled', so cancelled bookings are silently hidden) undocumented.

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?

States a specific verb and resource ('bookings between two times') and even describes what each returned booking contains (hosts, guests, confirmation call). It does not explicitly contrast with calendar_find_times or google_calendar_events, so sibling differentiation is only implicit.

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?

Usage is implied by the date-range framing and by the one routing hint ('person lists the meetings that person has'), but there is no explicit statement of when to prefer this over calendar_find_times or the google/m365 calendar tools. The agent must infer the choice.

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