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

With no annotations provided, the description must disclose behavioral traits, but it only says 'Confirm a budget update draft' without mentioning side effects (e.g., applying the change), required permissions, return values, or any post-confirmation behavior. This is a significant gap for a mutation-like action.

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 a single sentence, which is concise, but it is under-specified rather than efficiently structured. It provides minimal value beyond the tool name, and the brevity does not contribute to clarity.

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 confirm action with two parameters and no output schema, the description is severely incomplete. It does not explain how to obtain a draft_id, what happens after confirmation, or any prerequisites, making it insufficient for an agent to invoke 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 50%: customer_id has a description in the schema, but draft_id does not, and the tool description adds nothing about parameters. The description fails to compensate for the undocumented draft_id, leaving its purpose and format unclear.

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 verb 'Confirm' and a resource 'a budget update draft', clearly distinguishing it from the sibling google_ads_budget_update_prepare. It is not a tautology and conveys the core action, though it doesn't elaborate on what confirmation entails.

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 provided on when to use this tool, such as requiring a previously prepared draft or the workflow step. The description gives no context about prerequisites or alternative tools, leaving the agent to infer usage from the name and sibling tools.

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