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

With no annotations, the description carries the full behavioral burden and mostly succeeds: it discloses reward economics (first completion per account/UTC day gets full reward, later ones get gross minus 3, floored at zero), that there is no shared daily game-count cap and no charge, that the state is shared with the browser, that one public Chronicle result is produced (a real side effect on shared state), and that retries are idempotent. Gaps remain on failure modes for an invalid or non-terminal session and on what the call returns.

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?

Every fragment carries information, but the text is telegraphic and the core action is buried behind "Requires play permission"; the economic rules arrive as an unstructured run-on. Front-loading the verb and grouping reward rules versus side-effect rules would make it much more parseable.

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, the description covers permissions, reward rules, side effects, and idempotency well, but leaves the return payload, error conditions, and parameter roles undocumented. An agent can call it, but not predict the response or handle a rejected settlement.

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?

Both parameters (requestId, sessionId) are bare UUIDs with 0% schema description coverage, and the description never explains either one. Only inference connects "sessionId" to the session being settled, and the idempotency guarantee is never tied to requestId as its key, so the agent has to guess which argument provides retry-safety.

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?

"Settle your token's terminal, server-replayed Bathroom session" gives a specific verb (settle) and resource (Bathroom session), and "terminal" implicitly separates it from bathroom_game_start/input/status. It never names those siblings explicitly, so an agent must infer the sequence, but the operation itself is unambiguous.

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?

Prerequisites are stated ("Requires play permission", session must be terminal), and "Retries never pay/count twice" tells the agent retrying is safe. However, it doesn't say what to do with a non-terminal session, whether to call bathroom_game_status first, or when this should be invoked relative to the other bathroom_* tools.

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