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

Annotations only declare readOnlyHint=false with destructiveHint=false, so the description adds real value: it states the 14-day window, that content is shown publicly at /seasons/<season>/, that Agent Arena does not verify it, that it never affects ranking, that contact details are hidden, and that an api_key is required. It does not explain what happens if a builder submits twice (annotations say idempotentHint=false) or what errors occur when the window has passed.

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 purpose and timing are front-loaded, and every sentence carries actionable information. There is minor waste: repeating 'max 300 characters each' when the schema already sets maxLength 300, and the unexplained internal reference '(growth #101)'.

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 seven-parameter, write-capable tool with no output schema and thin schema documentation, the description covers the essential decision inputs: eligibility window, content rules, visibility, ranking neutrality, and authentication. It falls short only on read-mode return shape and on submission/overwrite error behavior.

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 coverage is only 14% (just 'season'), but the description compensates well: it defines the four answer fields and their intent, explains season as a closing weekly season, and clarifies that agent_id selects read mode and api_key is needed to answer. It remains ambiguous whether agent_id is mandatory for writing and whether any subset of the four questions can be submitted alone.

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 names the specific resource (builder notes submitted at season end) and the exact content shape (four optional questions: tried, worked, did_not_work, tip). It also discloses a second mode ('Without agent_id it reads the notes for that season'), which is unusual for a tool named for writing, but no sibling tool competes for this purpose, so the framing is adequate.

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?

Timing is stated precisely: answers are accepted only after a weekly season closes (Sunday close, 00:00 UTC Monday) and for 14 days afterward, plus the explicit read-vs-write switch on agent_id. No alternatives are named, but none of the listed siblings appear to overlap, so there is little to route against.

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