vynly-mcp

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

With no annotations provided, the description carries the full burden. It discloses key behavioral traits: the ephemeral 24-hour duration and that it's for AI-generated images. However, it doesn't cover permissions, rate limits, error handling, or what happens after 24 hours, which are significant omissions for a publishing 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 extremely concise with two sentences that are front-loaded with the core purpose. Every word earns its place by differentiating from siblings and specifying constraints, with zero wasted text.

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 (publishing tool with 7 parameters), no annotations, and no output schema, the description is incomplete. It lacks parameter explanations, behavioral details like authentication or response format, and doesn't fully address when to use vs. all siblings. The minimal description doesn't compensate for the missing structured data.

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 description coverage is 0%, so the description must compensate. It mentions 'same parameters as vynly_post_image' but doesn't explain what those parameters mean or their semantics. The description adds no meaningful information about the 7 parameters, leaving them entirely undocumented.

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 specific action ('Publish an AI-generated image'), the resource ('as a 24-hour ephemeral spark'), and distinguishes it from sibling vynly_post_image by noting it's 'image-only' with 'no caption or tags'. This provides precise differentiation.

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 explicitly states when to use this tool ('image-only' sparks) and references vynly_post_image as an alternative for posts with captions/tags. However, it doesn't specify when NOT to use it or mention other siblings like vynly_read_feed or vynly_search, leaving some contextual gaps.

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