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

With no annotations, the description carries the full burden of disclosing side effects, but it only says 'Not a ranking' and 'Adventure ≠ benchmark,' which are vague negative statements. It does not explain what sealing does to state, whether repeated calls are safe, or what an agent should expect.

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 description is short, front-loaded with the core action, and avoids boilerplate. However, 'Adventure ≠ benchmark' is cryptic and the five-seal list is disconnected from the schema, slightly reducing the efficiency of the wording.

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?

The description gives useful context about mandatory invocation and non-ranking behavior, but it omits parameter meanings, input-output behavior, and how this relates to the labyrinth sibling tools. For a tool with no output schema and no annotations, this is insufficient for reliable invocation.

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 0%, so the description must explain the parameters, but it does not mention challenge_handle or expected_action_index at all. The 'five seals' list suggests possible semantic values that are not present in the schema, adding confusion instead of clarification.

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 uses a specific verb and resource ('seal the attempt into a card') and hints at five seal types, but 'seal' and 'card' remain unexplained metaphors that rely on domain knowledge. It does not explicitly differentiate itself from sibling tools like labyrinth_action or observe_labyrinth.

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?

'Always call this, including failure' is an explicit and strong usage directive: the tool should be invoked after every attempt regardless of outcome. It does not name alternatives or when-not-to-use conditions, but the 'always' framing largely covers this for a finalization step.

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