ebay_create_or_replace_product_compatibility

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

No annotations are provided, so the description must disclose behavioral traits. It only says 'create or replace' but does not explain overwrite behavior, side effects, or requirements (e.g., inventory item must exist). This is insufficient for a mutating 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?

Single sentence with no redundant words. Front-loads the action and resource. Very concise.

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?

Given the complex nested input schema and the existence of sibling tools for deletion and retrieval, the description is too brief. It lacks information about expected behavior, prerequisites, or return values (no output schema). An agent would need additional context to use this 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 has 100% description coverage, so each parameter already has a brief explanation. The description adds no extra meaning beyond the schema, thus baseline score of 3 is appropriate.

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 uses verb 'Create or replace' and resource 'product compatibility for an inventory item', clearly stating the action and scope. It distinguishes from sibling tools like ebay_delete_product_compatibility and ebay_get_product_compatibility.

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 on when to use create vs replace, nor any mention of prerequisites or alternatives. The tool name implies both creation and replacement but the description fails to clarify the context for each.

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