ebay_create_campaign_negative_keyword

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

With no annotations provided, the description must fully disclose behavioral traits. It only states that the tool creates a negative keyword and prevents ads, but does not mention side effects (e.g., overwriting existing keywords), idempotency, permissions required, rate limits, or what happens on error.

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 consists of two clear sentences with no unnecessary words. The first sentence immediately states the action and resource, front-loading the core purpose.

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 simple tool with 2 required parameters and no output schema, the description is adequate but lacks usage examples, error handling, or references to related tools. It covers the basic functionality but could be more complete.

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% with descriptions for both parameters. The description adds context about campaign-level scope but does not explain match type semantics or provide examples. Baseline 3 is appropriate as the schema already documents the parameters adequately.

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 the tool creates a campaign-level negative keyword with the specific effect of preventing ads from showing for that keyword across the entire campaign. It uses the verb 'Create' and specifies the resource as 'campaign-level negative keyword', which distinguishes it from siblings like ad-group level or bulk versions.

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?

The description lacks any guidance on when to use this tool versus alternatives such as 'ebay_bulk_create_campaign_negative_keywords' or 'ebay_create_ad_group_negative_keyword'. No context is given about prerequisites or scenarios where this tool is appropriate.

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