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

With no annotations, the description carries the behavioral disclosure burden. It usefully discloses that without a time range only the most recent price is returned, timestamps are in Unix milliseconds, and currency format requirements (lowercase alphanumeric). These are beyond schema info and help the agent avoid common mistakes. However, it does not mention pagination behavior or return value shape, leaving some gaps.

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 five sentences, front-loaded with the purpose, and each sentence adds necessary context: scope, default behavior, units, and format. There is no fluff or repetition, and it is appropriately sized for the tool's complexity.

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?

The description covers core behavior but lacks details about the return format (e.g., fields or structure) since there is no output schema. It also does not mention pagination usage in the description itself, although the schema describes pagination_key. For a 5-parameter tool with no output schema, more context about what 'price data' looks like would improve completeness.

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 100%, so the baseline is 3. The description adds little beyond the schema: it reiterates currency format and timestamp units already present in the schema. It does not provide extra semantic context for parameters like pagination_key or explain how limit interacts with time ranges beyond what schema says.

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 fetches historical crypto price data from Binance for a specific currency pair over an optional time range. It distinguishes itself from siblings like dome_candlesticks and dome_market_price by explicitly focusing on historical price data with optional time filtering.

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?

Usage context is implied through phrases like 'historical crypto price data' and 'optional time range', but no explicit when-to-use vs alternatives are given. There is no mention of exclusions or named alternative tools, so the agent must infer usage from the purpose alone.

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