API-Market MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states 'Make a POST request' which implies a write operation, but does not clarify authentication needs, rate limits, error handling, or what happens after upload (e.g., processing for face swap). This leaves critical behavioral traits unspecified for a mutation 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?

The description is a single, direct sentence with no wasted words, making it appropriately concise. However, it is front-loaded with technical details ('POST request to capix/faceswap/upload/') rather than a clear purpose, slightly reducing effectiveness.

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 complexity implied by 'faceswap' (likely image/video processing), no annotations, and no output schema, the description is incomplete. It lacks details on what to upload, expected outcomes, error cases, or how it integrates with sibling tools like 'ImageFaceSwap', failing to provide sufficient context for effective use.

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?

The input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description does not add parameter details, which is appropriate. Baseline is 4 for 0 parameters, as the schema fully covers the absence of inputs.

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 'Make a POST request to capix/faceswap/upload/' restates the tool name 'Upload' in a technical manner without specifying what resource is being uploaded or what the operation achieves. It mentions 'faceswap' which hints at image processing, but lacks a clear verb+resource statement like 'Upload an image for face swapping' that distinguishes it from generic upload tools.

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 is provided on when to use this tool versus alternatives. The description does not mention prerequisites, context, or sibling tools like 'ImageFaceSwap' or 'VideoFaceSwap' that might be related. It fails to specify if this is for images, videos, or other data, leaving usage unclear.

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