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

Annotations already declare readOnlyHint=true, and the description adds useful access context: 'Every account plan; only the keyless demo surface is refused.' This goes beyond the annotations by clarifying who can use the tool and a specific rejection scenario, though it does not detail return structure.

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 description is two sentences, the first stating the core action and scope, the second covering access. Every word earns its place with no redundancy or filler.

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 simple one-parameter read-only tool, the description is nearly complete. It states the resource (Kalshi market), the output (order-book depth), and access caveats. The only omission is the exact shape of the order book return, but given no output schema and the tool's simplicity, it is acceptable.

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?

The input schema has 100% coverage with the ticker description, so the baseline is 3. The description itself does not add extra parameter semantics, but the schema's own description ('from kalshi_search_markets') provides useful sourcing context. No additional compensation needed.

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 clearly states the tool retrieves the latest yes/no order-book depth for a Kalshi market by ticker. This specific verb+resource combination distinguishes it from sibling tools like limitless_get_orderbook, which target a different platform.

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 description does not explicitly state when to use this tool instead of alternatives. It implies the need for a ticker but lacks guidance on selecting it vs. other order-book tools, such as limitless_get_orderbook. No exclusions or alternative conditions are mentioned.

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