google_ads_bulk_update_keyword_bids

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

No annotations provided, so the description carries full burden. It only says 'Update bids' and gives a success message, but does not disclose if the operation is atomic, error handling, permission requirements, or what happens if some updates fail.

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 sentences plus structured Args/Returns/Example. The first sentence states the purpose. No unnecessary information. Efficient and well-organized.

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?

Covers purpose, parameters, return type, and provides an example. With 2 simple parameters and an output schema declared, the description is largely complete. Lacks error handling or usage context, but adequate for a straightforward update tool.

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 0%, but the description explains customer_id format (no hyphens) and bid_updates as a list of dicts with specific keys. The example further clarifies the parameter structure, fully compensating for the schema gap.

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?

Description clearly states 'Update bids for multiple keywords at once', with a specific verb and resource. It distinguishes from the singular google_ads_update_keyword_bid tool via the word 'bulk' and multiple keywords.

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 explicit when-to-use or when-not-to-use guidance. The example and name imply a bulk operation, but alternatives like google_ads_batch_update_bids are not mentioned, leaving ambiguity for the agent.

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