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

Annotations already declare non-read-only, idempotent, non-destructive, non-open-world behavior, so the safety profile is covered. The description adds that the created set is empty, that access must pre-exist, and that no import or processing is triggered, which is meaningful mutation context. It does not discuss what happens on a repeated idempotency key beyond the annotation.

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 tight sentences, with the core action and scope front-loaded and constraints/exclusions trailing. Nothing is wasted, though the sentence could be slightly sharper about the idempotency parameter given its required status.

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, so return values need no prose explanation, and annotations carry the safety and idempotency profile. The description covers scope, prerequisites, and exclusions; the remaining gap is the undocumented required idempotencyKey parameter, which is the main thing an agent could get wrong.

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 0% and none of the three parameters (name, workspaceId, idempotencyKey) are explained in the description; the constraints (name 1-200 chars, idempotencyKey min 8 chars, nullable workspaceId defaulting to null) exist only in the raw schema with no prose. The phrase 'in the explicit workspace' loosely implies workspaceId but adds no semantics about the null default or key reuse.

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 ('Create') and resource ('camera and screen recording set'), and the qualifier 'empty' plus 'in the explicit workspace' distinguishes it from siblings like recording_sets_clips_create (adds clips) and recording_sets_finalize. An agent can tell what this tool does and does not do without opening the schema.

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?

Provides a prerequisite condition ('Requires existing recording-set access') and explicit exclusions ('does not import files or start processing'), which steers the agent away from populating or processing workflows. It stops short of naming the specific sibling to use for adding clips or finalizing, so it is clear context rather than full when/when-not routing.

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