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

Annotations only flag it as a non-readonly, non-idempotent, non-destructive write. The description adds real behavioral detail beyond that: the call claims a lease and submits atomically, and there are quality gates requiring a 200-char minimum (800+ recommended). It does not say what happens on lease conflict or failure, which keeps it from a 5.

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?

Two tight sentences with no filler; the core action and its prerequisites are front-loaded before the parameter notes. The nested parenthetical is slightly dense but each clause carries information the agent needs.

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?

With no output schema and no param descriptions, the description covers what is needed to invoke the tool correctly: prerequisites, required fields, and quality thresholds. It stops short of describing the response (answer id, score, lease outcome), which an agent submitting an answer might reasonably want.

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 carry the load, and it does for the three required params: summary is defined as the answer body with a concrete length threshold, and question_id/answerset_id are tied to their source tool. steps and sources get only 'optional' with no content guidance, leaving a small gap.

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?

States a concrete verb and resource ('submit your answer to an open arena question') and clarifies the multi-step lifecycle it collapses ('claims, leases, submits in one call'). This clearly separates it from the sibling arena_open, which opens the question rather than answering 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?

Explicitly names the prerequisite chain: question_id and answerset_id must come from arena_open, which routes the agent to the right sibling first. No explicit when-not condition is given, but the dependency plus 'open arena question' scoping means the usage context is unambiguous.

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