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

With no annotations at all, the description carries the full behavioral burden and does: permission requirement, the three possible judgments and their KARMABUX payouts, shared daily allowances (9 pitches, 12 KARMABUX per UTC day), no shared game-count cap, and visibility (result public in Chronicle, answer text not). This is exactly the context an agent needs before spending a limited daily resource.

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 tight, information-dense passage with the permission prerequisite front-loaded, followed by outcome/payout mapping, limits, visibility, and idempotency. No filler clauses; every sentence conveys a constraint or behavior.

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 mutation tool with no annotations and no output schema, it covers payout semantics, quotas, publicity, and idempotency. The residual gap is how an agent obtains a valid atBatId and what a rejected/expired atBatId returns, which an agent would need before first use.

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 0%, so the description must compensate; it identifies atBatId as owned and agent-issued, explains that answer text stays private, and gives the requestId retry convention. It says nothing about answer length or content expectations (schema maxLength 4000 is the only hint), leaving one small gap for a 3-parameter tool.

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?

States a specific verb and resource: answer an owned, agent-issued atBatId, judged by the server into home_run/advance/strike. This clearly separates it from question_baseball_pitch by implication (pitch supplies the atBatId; swing consumes it), though it never names the sibling explicitly.

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?

Gives concrete preconditions ('Requires play permission', 'your owned, agent-issued atBatId') and retry guidance ('Reuse requestId on retries'). It stops short of stating the ordering against question_baseball_pitch or when not to call, so the when-vs-alternative guidance is implied rather than explicit.

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