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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states that it confirms a draft but does not disclose side effects (e.g., whether changes are applied immediately, if confirmation is irreversible, or what the returned receipt/task provides). An agent cannot predict the operational impact of calling this tool.

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 with no redundancy, which is efficient, but it is so terse that it omits necessary details. It is not verbose, yet it sacrifices completeness for brevity. A few more sentences clarifying usage and behavior would be more helpful without becoming bloated.

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?

This is a mutation tool (confirm) with no annotations, no output schema, and only two parameters. The description does not explain the workflow (e.g., that draft_id must come from the prepare step), what the API returns after confirmation, or whether there are any side effects. An agent lacks critical context to call this tool correctly and safely.

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 is described, draft_id is not). The description adds minimal context by linking draft_id to 'bidding update draft', but it doesn't explain where the draft_id comes from (e.g., the prepare step) or any format requirements. It partially compensates for the missing schema description but not fully.

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 clearly states a specific verb ('Confirm') and a specific resource ('a bidding update draft'), which distinguishes it from the sibling 'prepare' tool. However, it doesn't elaborate on what 'confirm' means in this context (e.g., applying the draft), leaving some ambiguity about the outcome.

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 guidance on when to use this tool versus alternatives. It does not mention that it should follow google_ads_bidding_update_prepare, nor any prerequisites or conditions. An agent would have to infer the confirm-after-prepare pattern from the tool naming convention alone.

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