ebay_bulk_create_ads_by_listing_id

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

With no annotations, the description partially discloses behavior by mentioning the 500-listing limit and campaign types. However, it omits important details like error handling, atomicity, authentication requirements, and rate limits.

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?

Two succinct sentences with no wasted words. The core purpose is front-loaded, and the additional details (limit and campaign types) are directly relevant.

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?

Missing output schema and no explanation of return values, error behavior, or prerequisites. For a bulk creation tool with nested objects, the description could elaborate on the result format or failure modes.

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 100%, so baseline is 3. The description adds 'supports both CPS and CPC campaigns', hinting at campaignId context but not adding significant parameter meaning beyond the schema.

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 it creates multiple ads using listing IDs, distinguishing it from sibling tools like ebay_bulk_create_ads_by_inventory_reference. It also specifies a max of 500 listings and support for CPS and CPC campaigns.

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?

Provides a useful constraint (max 500 listings per call) and campaign type support, but lacks explicit guidance on when to use this tool versus alternatives, such as when not to use it or how it compares to other ad creation tools.

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