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

With no annotations, the description carries the full burden, and it does disclose access-relevant behavior: the HTTP endpoint, the $0.04 x402 payment/auth requirement, and the returned fields (blended live probabilities, resolution dates, slugs). It omits rate limits, staleness, and pagination behavior, but the auth/cost disclosure is meaningful context beyond the schema.

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?

Front-loaded with the core purpose and return content, and the trailing HTTP/pricing/docs block is compact. It is mildly redundant ('in one call' followed by 'one-call board') but otherwise efficient.

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 annotations, the description compensates by enumerating return fields, which is what an agent needs to know before calling. The one gap is the undocumented limit parameter; otherwise it is complete for a bulk-read 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?

There is one parameter (limit, required, 1-50) and schema description coverage is 0%, so the description must compensate but does not mention limit at all. 'Top markets by volume' loosely hints at ordering, but whether limit caps the returned count or selects a tier is left unspecified.

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 specific verb+resource: a board of climate and weather prediction markets with live probabilities. The domain ('climate and weather') separates it from the crypto/econ/sports board siblings. It stops short of naming the closest alternatives (probability_calendar_climate, probability_movers_climate) that an agent must choose between.

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 bulk read for agents tracking the state of climate and weather at a glance' plus 'per-market slugs for drill-down' implies the board-then-fetch workflow, so usage is inferable. However there is no explicit when-not guidance and no mention of how this differs from the calendar or movers variants in the same family.

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