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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, and the description's 'Get' phrasing is consistent with them. The description adds modest context beyond the schema by labeling the tokens as CLOB outcome tokens and capping the batch at 20, but this largely restates schema constraints (maxItems: 20). No contradiction found.

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 single, well-structured sentence of about 17 words that front-loads the key information (what prices are returned) and ends with the batch constraint. Every word earns its place; there is no padding or repetition.

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 an output schema present, the description need not explain return values, and the annotations fully cover the safety profile. The main gap is that the description does not direct the agent to a sibling tool or explain how to source tokenIds, but for a simple one-parameter read tool, the remaining context is largely sufficient.

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 compensate for the undocumented tokenIds parameter. It clarifies that tokenIds are CLOB outcome tokens and allows up to 20, which maps to schema constraints, but it never explains what a tokenId looks like, where to obtain one, or how it relates to a market. This is insufficient compensation for zero schema coverage.

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 a specific verb (Get) and a specific set of data (BUY/SELL prices, midpoint, spread, last trade) for a scoped resource (up to 20 CLOB outcome tokens). It is clear about what it returns, though it does not explicitly differentiate from the sibling get_market_quotes, so it stops short of a 5.

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?

No guidance is given on when to use this tool versus alternatives such as get_orderbook, get_market_trades, or get_market_quotes. The description states what the tool does but never says when it is the right choice, so an agent must infer the decision from sibling names alone.

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