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

Annotations already declare readOnlyHint, idempotentHint and non-destructive, so the safety profile is covered. The description contributes the useful fact that this is a backward-compatibility alias, but it does not say what the call actually does to game state (ending the round, revealing the answer) or what a caller receives back – meaningful for a tool with no output schema.

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 sentence with zero waste, and the operative constraint ('never by the model') is front-loaded. Nothing to trim.

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 deprecated alias, the essential thing an agent needs – do not call this – is stated, and annotations cover the safety profile. The one gap is that it does not name the replacement tool explicitly, so an agent must infer 'weather_word_puzzle_give_up' from the sibling list.

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 (puzzle_number, time_zone, utc_offset_minutes, previous_guesses, conversation_id) are already documented in the schema. The description adds no parameter-level detail, so the 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?

Together with the title, the description makes clear this is the give-up/show-the-word puzzle step, and adds that 'give_up' is a legacy alias retained for backward compatibility. The functional role (a renamed puzzle step) is specific, though the description itself never restates the action and relies on the title to convey it.

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?

'Used only by the puzzle card, never by the model' is an explicit, unambiguous when-not-to-use rule plus the actor that does use it. An agent knows immediately not to route to this tool, and the sibling 'weather_word_puzzle_give_up' makes the replacement obvious.

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