Delegate frontend and design work to Kimi

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

Annotations declare destructiveHint=true and readOnlyHint=false, and the description reinforces this by distinguishing read-only modes (analyze/review) from implement which 'may edit the workspace.' The description adds valuable context about the mode-dependent mutation behavior that goes beyond the raw annotation flags, clarifying that not all invocations are destructive. This is a meaningful addition though the safety profile is partially covered by annotations.

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 focused paragraph that front-loads the purpose and enumerates domains concisely. The mode guidance is packed efficiently. It could arguably be slightly tighter, but every sentence earns its place and there is no fluff or repetition. Slightly below perfect due to the long enumeration, but appropriately sized for a complex delegation tool.

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 tool's complexity (9 parameters, delegation semantics, mutation risk) and the absence of an output schema, the description does a solid job covering purpose, safety, and mode selection. The 100% schema coverage handles parameter documentation. The main gap is the absence of guidance on structuring tasks or what success looks like, but acceptance_criteria parameter provides an observable-contract mechanism. Adequately complete for a delegation tool.

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 coverage is 100% and all parameters have descriptions in the schema, so the baseline is 3. The description adds value by clarifying the analyze/review/implement mode distinction and its behavioral implications, which enriches understanding of the mode parameter beyond its schema description. The task and scope fields are self-explanatory, but no substantial additional semantics are needed given the schema's completeness.

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 uses specific verbs ('delegate') plus comprehensive resource enumeration (product design, UX, visual systems, components, styling, accessibility, responsive behavior, animation, client state, frontend-test). It clearly distinguishes from sibling delegate_backend (backend specialization) by listing frontend-specific domains. The 'analyze/review vs implement' split adds meaningful scope.

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 instructs when to use which mode: 'Use analyze/review for read-only work and implement for edits.' This gives clear contextual guidance. Combined with the mode enum in the schema and sibling specialization contrast (backend), the when-to-use guidance is strong and actionable.

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