Backlog Quest

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, and the description adds material context beyond them: no account or payment required, game titles and seed processed in memory and not stored, only an aggregate request event recorded, and seed-based determinism. That disclosure of side effects and privacy behavior is exactly what an agent needs before invoking.

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 core purpose and the read-only guarantee are front-loaded, and the sentences on determinism, auth, and storage each carry real information. Some wording duplicates the schema's mood definitions, which is the main redundancy.

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 five-parameter generative tool with a full output schema, annotations, and complete parameter documentation, the description covers purpose, constraints, safety profile, and determinism. Nothing an agent needs to call it correctly 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 description coverage is 100%, so all five parameters are already documented, including mood, seed determinism, and the games list constraints. The description largely restates the schema's mood meanings and seed behavior rather than adding new semantics, so baseline 3 applies.

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 opens with a specific verb and resource: choose exactly one title from an ordered 2–12 game backlog and return the selected game plus a time-boxed instruction. It also states the boundaries (it never launches, buys, installs, modifies, or accesses a game or account), so an agent knows exactly what the tool produces without opening the schema.

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 description gives concrete when-to-use context for each mode: quick to start immediately, focus for one clear objective, chill for low-pressure play, challenge for a difficult but reachable objective. There are no sibling tools, so no alternative routing is needed, but it does not state when NOT to call the tool.

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