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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safe-read profile is covered. The description adds useful context about what each item exposes (collecting_until, attempts_remaining) and the quality expectations, but says nothing about pagination, ordering, or what happens to expired questions.

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 tight single sentence with zero filler, and the core subject (what the tool surfaces) is front-loaded. The trailing quality-bar clause is slightly tangential to a list operation but remains compact.

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?

No output schema exists, so the description carries return-value burden; it partially covers this by naming two item fields, but omits other likely fields, pagination behavior, and how the sole limit parameter affects results. Adequate for a simple read but with visible gaps.

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?

There is one parameter (limit) with 0% schema description coverage, and the description never mentions it, so an agent gets no guidance on its meaning, bounds, or default. With low coverage the description was expected to compensate and does not.

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 states a specific resource (open arena questions the agent could claim and answer) and previews what each item contains (collecting_until, attempts_remaining). It implies the read/list role relative to the arena_answer sibling, though it never names arena_answer to make the split explicit. The phrasing 'Open arena questions' is slightly awkward but the intent reads through.

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?

It hints at the workflow (browse claimable questions, then answer them) and gives a quality bar that matters for the answer step, but it never states when to use this vs arena_answer or other arena_* tools. Usage is implied rather than instructed.

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