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jyarbro

eBay Seller MCP Server

by jyarbro

ebay_bulk_create_offer

Create multiple eBay offers in bulk by specifying SKU, marketplace, format, pricing, and policies for each item.

Instructions

Bulk create multiple offers

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
requestsYesBulk offer creation requests
Behavior2/5

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

No annotations provided, so description carries full burden. Does not disclose important behavioral details: batch size limits, atomicity, error handling, response format, or side effects. For a bulk mutation, this is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness2/5

Is the description appropriately sized, front-loaded, and free of redundancy?

One-sentence description is underspecified. Not front-loaded with key information. Could be improved by adding context about what 'offers' are and basic usage pattern.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Despite complex nested input schema and no output schema, description provides almost no context. Does not explain what an offer represents, relationship to inventory, required policies, or response behavior. Overall incomplete for a tool with this complexity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% for the single parameter 'requests' with description 'Bulk offer creation requests'. However, description adds no extra meaning beyond the schema. No guidance on constructing the nested array or required sub-fields like 'sku', 'marketplaceId', 'format'.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose2/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description 'Bulk create multiple offers' is vague. Does not specify what an 'offer' is in eBay context (e.g., listing offer, promotion offer). Siblings like 'ebay_bulk_create_ads_by_inventory_reference' and 'ebay_bulk_create_or_replace_inventory_item' are more specific. Could be confused with other bulk creation tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives. Sibling 'ebay_create_offer' exists for single offers. No context on prerequisites (e.g., inventory items must exist) or when bulk is preferred over individual.

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

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