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

Annotations already declare readOnly/idempotent/non-destructive, so the description earns credit for adding context beyond them: the separate private-image permission requirement and the fact that no allowance is consumed. It doesn't say what happens if permission is missing or how the image is rendered.

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?

Three tight sentences with no waste; the core action leads and the constraint/cost notes follow. Every sentence carries information.

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?

An output schema exists so return values needn't be described, and the safety profile is covered by annotations plus the permission note. The remaining gap is parameter guidance: with 0% coverage and two mutually ambiguous UUIDs, an agent lacks what it needs to call the tool 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 description coverage is 0% and neither jobId nor requestId is explained in the description. With two UUID parameters whose distinct roles (job vs. request) are non-obvious, the description should clarify which identifier to supply, but it says nothing.

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?

States a specific verb and resource — displaying a completed DressMe/TriFit result inside the conversation — which is clearer than a bare name restatement. It doesn't explicitly differentiate from the sibling get_trifit_try_on (likely the metadata fetch), so an agent must infer the display-vs-fetch split.

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?

'Uses only the existing result; no generation, upload, public share or new allowance is used' implies this is a display-only path rather than a creation path, and the private-image permission note flags a prerequisite. However, it never names an alternative (e.g., create_trifit_try_on or get_trifit_try_on) or states when to prefer one.

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