create_character_8dir

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

No annotations provided, so description carries full burden. It reveals the tool creates a persistent character and returns a character_id, but lacks details on side effects, authorization, or error states. The description is adequate but not overly transparent; it meets basic requirements but could be improved.

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?

Two sentences with zero waste. First sentence covers the core purpose and key details. Second sentence adds return value and usage guidance. Information is front-loaded and efficient.

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 13 parameters (2 required), nested objects, and no output schema, the description covers the essentials: what the tool does, its primary use case, and distinction from siblings. It does not mention error handling or detailed return behavior, but the schema covers parameters well. Slightly incomplete considering complexity, but adequate.

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%, baseline is 3. The description adds some value by specifying size range (32-168px) and mentioning 8 directional views (implicit in name). It does not elaborate on other parameters, but since schema fully describes them, this is acceptable.

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 purpose: creating a persistent game character with 8 directional views. It specifies size range and directly distinguishes from sibling tool create_character_4dir by mentioning use cases (top-down/isometric games needing diagonal directions) and alternative for 4-direction games.

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?

Explicitly states when to use this tool vs. the alternative: 'Use this for top-down or isometric games needing diagonal directions. For 4-direction games use create_character_4dir.' Also mentions the returned character_id is for use with animate_character, linking to another tool.

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