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

Annotations already declare destructive, idempotent, and open-world behavior; the description adds the material operational detail that the enabled path is gated on explicit in-chat user confirmation, and that pausing does not require it. It does not describe partial-failure handling or whether an unconfirmed enable request errors or is silently ignored, which is the main residual gap.

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 short sentences, front-loaded with the capability, then the behavioral gate, then the id-syntax gotcha. No filler or repetition, and the most error-prone detail (id format) is placed last as a call-out.

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?

For a five-parameter bulk mutation tool with no output schema, the description covers what gets changed, the confirmation requirement, and the id convention, which is enough to call it safely. It omits return-value behavior across 500-item batches (per-item success/failure) and whether account defaults apply, but these are secondary given the annotations.

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 60% and the two undescribed parameters (level, status) are enums whose values are self-explanatory, so the schema carries most of the burden. The description reinforces the composite 'adGroupId~id' form for ads and keywords, which is the one non-obvious parameter convention, though it merely repeats what the schema already states and says nothing extra about the account or confirm parameters.

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?

Names a specific verb pair (pause/enable), an explicit resource set (campaigns, ad groups, ads, keywords), and the distinguishing scope 'many ... in one call' that separates it from single-item siblings like google_ads_set_status or google_ads_pause_campaign. An agent can identify the operation 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?

Gives clear conditional usage: pausing executes directly, enabling requires the user's confirmation in chat, and it states which id format to use for ads and keywords. It stops short of naming alternatives (e.g., single-item status tools) or telling the agent when to prefer a non-bulk call for one-off changes.

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