Draft removing an Analytics key event

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

Annotations already declare destructiveHint=true and readOnlyHint=false, yet the description adds substantial non-obvious behavior: the event keeps firing and stays in event reports, only future key-event status is removed, historical key events are not reclassified, the preview names the exact event/counting method/create time, and resolution runs against keyEvents.list.

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?

Front-loaded with the core verb and PREVIEW outcome, then lays out effects and error behavior. Dense but each sentence carries distinct information; the API URL tail is the only low-value addition.

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 an output schema present and annotations covering safety, the description is complete: it covers intent, side effects, resolution behavior, and the confirm/apply gate. An agent would need nothing further to call it 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?

Schema coverage is 100%, so the baseline is 3, but the description adds resolution semantics beyond the schema: event_name is matched against the property's key events and an unknown name returns the existing key events rather than erroring. That meaningfully supplements the schema's field descriptions.

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+resource+scope: drafting the removal of a GA4 key event, returning a PREVIEW. It clearly distinguishes itself from sibling draft_key_event (likely create/update) and from confirm_and_apply, which the description names as the applying counterpart.

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?

It explains the draft-then-confirm workflow ('nothing changes until confirm_and_apply applies it'), and describes edge conditions: unknown names return existing key events, and non-deletable events are refused. It does not explicitly name when to prefer this over alternatives like draft_key_event or list_key_events, but the context is clear.

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