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32n1

EVE Online Companion MCP Server

by 32n1

eve_market_orders

Retrieve active market orders for your EVE Online character to monitor buy and sell listings, track inventory status, and manage trading activities.

Instructions

Get your active market orders

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
as_characterNoLinked character (name or ID) — defaults to active
Behavior2/5

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

With no annotations provided, the description carries full burden but only states what the tool does without disclosing behavioral traits like authentication requirements, rate limits, response format, or pagination. It mentions 'your' implying personal data but doesn't clarify access controls or data scope.

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

Conciseness5/5

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

The description is a single, efficient sentence that directly states the tool's purpose without unnecessary words. It is front-loaded and appropriately sized for a simple tool.

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?

Given no annotations and no output schema, the description is incomplete. It doesn't explain what 'active market orders' entails, the return format, or any behavioral context like errors or limitations. For a data retrieval tool in a complex system like EVE Online, more detail is needed.

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

Parameters4/5

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

The input schema has 100% description coverage, so the baseline is 3. The description adds no parameter information, but with only one optional parameter and high schema coverage, this is acceptable. The tool's purpose inherently implies the parameter's role in character selection.

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

Purpose4/5

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

The description clearly states the verb 'Get' and resource 'your active market orders', making the purpose specific and understandable. It distinguishes from siblings like 'eve_market_price' or 'eve_market_appraise' by focusing on orders rather than pricing or appraisal, though it doesn't explicitly contrast them.

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?

The description provides no guidance on when to use this tool versus alternatives like 'eve_market_price' or 'eve_market_appraise', nor does it mention prerequisites such as authentication or character selection. It lacks explicit usage context or exclusions.

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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