21st_magic_component_inspiration

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

No annotations are provided, so the description carries full burden. It discloses that the tool returns JSON data without generating new code and that the agent must edit files afterward, which adds some behavioral context. However, it lacks details on permissions, rate limits, error handling, or what 'previews' entail. For a tool with no annotations, this is insufficient to fully understand its behavior.

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 three sentences but has redundancy (e.g., repeating 'this tool') and unclear phrasing like '/21st fetch data.' It's front-loaded with purpose but includes an instruction ('After calling this tool...') that might be better placed elsewhere. Some sentences could be more efficient, but it's not overly verbose.

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 no annotations, no output schema, and two parameters with full schema coverage, the description is incomplete. It mentions returning JSON data and requiring file edits but doesn't explain the output format, error cases, or how 'previews' are handled. For a tool that involves fetching and post-processing, more context is needed to guide the agent effectively.

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 100%, so the schema already documents both parameters ('message' and 'searchQuery'). The description doesn't add any meaning beyond the schema—it doesn't explain how parameters interact or provide usage examples. With high schema coverage, the baseline is 3, as the description doesn't compensate but doesn't detract either.

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 states the tool fetches data and previews from 21st.dev and returns JSON data of matching components, which clarifies its purpose. However, it doesn't clearly differentiate from sibling tools like '21st_magic_component_builder' or '21st_magic_component_refiner'—it mentions 'without generating new code' but doesn't specify how this differs from those siblings. The purpose is somewhat vague regarding the exact scope compared to alternatives.

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 provides minimal guidance: it says 'Use this tool when the user wants to see component, get inspiration, or /21st fetch data and previews from 21st.dev,' but this is broad and doesn't specify when to choose this over siblings like '21st_magic_component_builder' or 'logo_search.' No explicit alternatives, exclusions, or context for tool selection are given, leaving usage unclear.

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