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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds essentially nothing beyond the name's 'prepare' wording — it does not explain what 'prepare' returns (an approval plan/task), that a subsequent confirm is required, or any side effects, so it contributes little behavioral context.

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?

A single front-loaded sentence with no wasted words. It is efficient, though the extreme brevity is more under-specification than disciplined conciseness for a 6-parameter tool.

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 mutation-staging tool with 6 parameters, 17% schema coverage, no output schema and only baseline annotations, the description is inadequate. It omits the confirm step, batch limit, return value, and per-parameter meaning, so an agent lacks what it needs to invoke 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 description coverage is only 17%, so the description is expected to compensate, but it only hints at entity levels (campaign/ad group/ad). It says nothing about the items array and its 10-item cap, entity_id, ad_group_id, or connection_context, leaving most of the 6 parameters undocumented in both schema and description.

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?

The description gives a specific verb ('prepare') and resource ('pausing') plus the target levels (campaign, ad group, ad), so the agent knows exactly what the tool stages. It does not, however, explicitly differentiate itself from the sibling google_ads_status_pause_confirm, leaving the two-step flow to be inferred from the name.

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?

There is no statement of when to use this versus the confirm sibling, no mention that this is the first half of a prepare/confirm pair, and no prerequisites or exclusions. The agent must infer the workflow entirely from the tool name.

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