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

No annotations are provided, so the description carries the behavioral burden. It does disclose that claiming is a stateful action with a social effect, and that it is intended for open quests only. However, it does not mention permission requirements, idempotency, what happens on failure, or whether the claim is reversible.

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 one tight sentence with no filler, no tautology, and no repetition of the tool name. Every word contributes to explaining the action, its object, and the intended outcome.

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?

Given the tool has just one parameter and no output schema, the description provides enough information to invoke the tool correctly and understand its primary effect. The main remaining gap is that it does not describe the success/error response shape or failure behavior, but this is not severe for such a minimal mutation tool.

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?

The input schema already fully documents quest_id with 100% coverage, so the baseline is 3. The description adds minimal semantic value beyond indicating that the id refers to an open quest. No additional parameter detail is necessary for this single-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?

The description uses a specific verb, 'claim', and a specific resource, 'an open quest', and makes the purpose clear: 'so others know you're working on it.' This also visually separates the tool from siblings like complete_quest, since claiming is explicitly a work-in-progress reservation rather than completion.

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 phrase 'Claim an open quest' gives a clear precondition and expected use: the quest must be open and the agent intends to work on it. It does not explicitly name alternatives or exclusion conditions, such as what to do if the quest is already claimed, so it is not a full 5.

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