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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds only the qualitative words 'compact' and 'live', conveying that this is a lightweight live feed rather than a full detail endpoint, but says nothing about freshness or update 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?

A single short phrase, front-loaded and free of waste. Its brevity is efficient but borders on under-specification rather than true conciseness.

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 an output schema and annotations present, the description needn't explain return values or safety, but for a tool embedded in a dense family of mlb_game_* siblings it should at least distinguish itself from mlb_game_boxscore and mlb_game_play_by_play. That differentiation is missing.

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% and the single id parameter is fully documented in the schema as a numeric MLB game id. The description adds nothing about the parameter, so the baseline 3 for a schema-documented single param is appropriate.

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 names the resource (MLB live game) and implies a read feed plus box score, but uses no clear verb and overlaps confusingly with the sibling mlb_game_boxscore, which presumably returns the box score. An agent cannot confidently tell why this tool differs from that sibling.

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 when-to-use guidance and no mention of alternatives, despite many closely-related siblings (mlb_game_boxscore, mlb_game_play_by_play, mlb_schedule). The agent must guess which game tool to pick.

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