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

No annotations are provided, so the description must disclose behavioral traits. It does not mention the return format (e.g., OHLCV candles), date range behavior, pagination, or any limitations. The description is promotional ('detailed view of trends') rather than informative about actual behavior.

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 only two sentences but contains redundancy: 'Track forex price movements' and 'provides hourly intraday data' convey similar information. It could be condensed to a single, more direct sentence without losing value.

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 must stand alone to explain what the tool returns. It does not state that it returns hourly candles/OHLC data, how the from/to parameters affect the result, or whether the data is real-time or historical. This leaves significant gaps for an agent deciding whether to invoke the 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?

Schema description coverage is 100% for all three parameters (to, from, symbol), so the schema already documents their meanings. The description adds no extra parameter semantics beyond referring to 'currency pairs', which the schema's symbol example already implies. Baseline 3 applies.

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 provides hourly intraday data for currency pairs, specifying the resource (forex) and interval (1-hour), which distinguishes it from 1-minute and 5-minute forex siblings. The verb 'track' is slightly vague, but 'provides' clarifies the operation.

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 implies usage for hourly intraday analysis but does not explicitly contrast with alternative intervals (e.g., getForex1MinuteData, getForex5MinuteData) or state when not to use this tool. Given the sibling list, explicit guidance would improve clarity.

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