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

The description discloses that the tool uses minimax and alpha-beta pruning and operates per turn, which is useful behavioral context beyond the name and schema. With no annotations, the description carries more burden, but it still omits important behavior details such as the output format, board representation, and whether state is required or just optional.

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, with no wasted prose beyond the redundant tool-name prefix. It conveys the core algorithm and turn scope in a single concise line.

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?

With four string parameters, no required parameters, and no output schema, the description leaves too much unspecified: exact board encoding, player representation, what 'state' means, and what the returned move looks like. An agent would struggle to know how to format a correct call despite understanding the high-level purpose.

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 baseline is 3 even though the description itself adds no parameter-level detail. The schema descriptions are mostly tautological ('Turn to process', 'Board to process') and do not explain expected formats, serialization, or how state/player relate to the board, so the description does not compensate for that ambiguity.

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 identifies this as a Connect Four move generator using minimax with alpha-beta pruning, which is specific enough to distinguish it from sibling game-move tools like tictactoe-move, chess-move, and reversi-move. However, it lacks an explicit verb such as 'compute' or 'return', so the action is implied rather than stated.

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 phrase 'per turn' gives some context that this tool produces one move at a time for Connect Four, but it never explicitly says when to choose this tool over alternatives. The guidance is mostly implicit from the tool name and game reference, with no exclusion or alternative routing.

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