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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds nothing beyond that: it does not explain what a 'cutoff' timestamp means, whether it is a single global value or per-series/per-market, what timezone/format it uses, or how it relates to the historical market tools.

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 short, front-loaded sentence with no filler. Its brevity is appropriate, though it errs toward under-specification rather than excess, which is penalized under contextual completeness.

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?

An output schema exists, so return-shape explanation is not required. However, for a tool whose entire value is defining the boundary of 'historical' Kalshi data, the description gives no indication of scope, applicability, or how the cutoff should be used alongside kalshi_historical_markets and kalshi_historical_trades.

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 tool takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. The empty schema with additionalProperties=false already communicates that no input is accepted.

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 is a noun phrase that essentially restates the tool name ('kalshi_historical_cutoff' → 'Kalshi historical data cutoff timestamps') with no verb, so an agent cannot tell whether it fetches, lists, or computes anything. It does not distinguish this from siblings such as kalshi_exchange_schedule, kalshi_historical_markets, or kalshi_markets_history.

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?

There is no statement of when to call this tool, when not to, or which sibling to prefer for historical data. The agent is left to infer its role purely from the name.

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