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

No annotations are provided, so the description carries the burden of explaining behavior. 'minimax alpha-beta' hints at the computation method, but does not clarify whether it returns the best move coordinates, a board state, or something else. Does not mention depth limits, what happens with invalid moves, or whether it mutates state.

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 short and front-loaded: the name is repeated once, then a parenthetical adds the algorithm. No wasted words, but it is more of a label plus algorithm hint than a full usage explanation.

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?

For a game-solving tool with no annotations and no output schema, the description is incomplete. It does not describe the expected board string format, the move output format, whose turn is being processed, or the role of 'player'. An agent has enough to know this is an Othello move solver but not enough to invoke it reliably.

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%, but the parameter descriptions are generic: 'Turn to process', 'Board to process', 'Player to process'. These are minimally meaningful and do not explain board format, turn semantics, or player values. The description does not compensate by defining board notation or what values 'turn' and 'player' take.

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 says 'Reversi/Othello move (minimax alpha-beta)', identifying a specific verb/resource and algorithm. It's clear it computes a move for a Reversi/Othello game, although it doesn't explicitly discuss scope or how it differs from similar game-move siblings like x402-chess-move, x402-connect4-move, x402-tictactoe-move.

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?

There is no guidance on when to use this tool versus alternatives. The sibling list contains many other game-move tools, so the agent needs to infer that Reversi/Othello is the distinguishing use case. Does not state expected inputs formats, side effects, or prerequisites.

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