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

No annotations are provided, so the description carries the full burden. 'Prepare copying' hints that this is a staging action rather than the final copy, but it does not disclose whether it mutates anything, what it returns, how it relates to the confirm step, or any side effects.

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?

The description is very concise and front-loaded, with no filler words. It effectively communicates the core action in one sentence, though it sacrifices valuable details that other dimensions require.

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 tool with 6 parameters, no output schema, and no annotations, this description is incomplete. It omits the prepare/confirm relationship, parameter roles, return behavior, and any indication of what happens after this step.

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%, and the description adds no parameter-level meaning. While names like source_ad_id and target_ad_group_id are somewhat self-explanatory, optional fields like headlines, final_urls, and descriptions are not explained at all, leaving their role ambiguous.

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 states a specific action and resource: 'Prepare copying a responsive search ad into a target ad group.' This is clear enough to know what the tool is for, but it does not explicitly distinguish itself from google_ads_copy_ad_confirm or explain the prepare/confirm workflow.

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?

No guidance is given about when to use this prepare step versus the confirm step, or whether it should be followed by google_ads_copy_ad_confirm. The agent is left to infer usage from the tool name and sibling pattern.

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