visualize_fen

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

No annotations are provided, so the description carries the full burden. It states the conversion function but lacks behavioral details such as error handling for invalid FEN, output format specifics (e.g., line breaks, character set), or performance considerations. This leaves gaps in understanding how the tool behaves beyond its basic purpose.

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, efficient sentence that front-loads the core functionality without any wasted words. It is appropriately sized for the tool's straightforward purpose.

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 (simple conversion), no annotations, no output schema, and low parameter coverage, the description is incomplete. It lacks details on output format, error cases, and parameter semantics, making it insufficient for reliable agent use without additional context.

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 the description does not add meaning beyond the schema. It mentions 'FEN notation' but does not explain what FEN is, valid formats, or examples. With 1 undocumented parameter, the description fails to compensate for the schema's lack of details.

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 ('Convert') and target ('FEN notation to ASCII chess board visualization'), providing a precise verb+resource combination. It distinguishes the tool's purpose effectively without relying on sibling tools for context.

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 implies usage when FEN notation needs visualization, but provides no explicit guidance on when to use this tool versus alternatives or any exclusions. With no sibling tools, the context is straightforward but lacks detailed operational boundaries.

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