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

Annotations already declare readOnlyHint, destructiveHint=false and openWorldHint=false, so the safety profile needs no restating. The description adds the useful behavioral fact that results are scoped to 'upcoming' appointments by default, but says nothing about ordering, result horizon, or pagination limits.

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?

Two short sentences, zero filler, with the result scope front-loaded before the parameter hint. Every clause carries information.

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?

An output schema exists and annotations cover safety, so the definition is minimally sufficient. However, for a listing tool the description never clarifies the default time horizon of 'upcoming', result ordering, or caps, and it does not position the tool against list_events.

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% and both parameters already carry ISO 8601 descriptions including the 'from' default of now. The description only reinforces that the pair is optional and bounds a window, adding little beyond 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?

States a specific verb and resource ('Upcoming appointments on the workspace calendar') with a clear scope qualifier. It is clear enough to act on, but it does not distinguish itself from the sibling list_events, which an agent could plausibly confuse with appointments.

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 only implied by the 'upcoming' scoping and the optional window; there is no explicit statement of when to call this versus list_events or get_contact. No exclusions or prerequisites are given.

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