subscribeTickers

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

The annotations already mark this as read-only and open-world, so the safety profile is covered. However, the description does not explain subscription lifecycle, whether it waits for a snapshot or streams updates, what timeoutMs/messageCount do, or what happens once messageCount is reached.

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 sentence is concise and front-loaded, but the brevity reflects under-specification rather than purposeful structure. Key usage and behavioral information is absent.

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 subscription tool with four parameters, no output schema, and many close siblings, this description is too thin. An agent cannot infer the response shape, the effect of the timeout/count parameters, or the intended relationship to getTickers and subscribeSpreadTickers.

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%, yet the description provides no parameter semantics at all. It does not explain that symbol is the trading pair, that category selects the market type, or that timeoutMs and messageCount control how long or how many ticker messages are collected.

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 states a specific action ('订阅' / subscribe) and a concrete resource ('行情快照（Ticker）' / market ticker snapshot), so an agent can tell this is a ticker subscription. It does not differentiate from sibling tools such as subscribeSpreadTickers or getTickers, which keeps it below 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?

There is no guidance on when to use this tool instead of the many ticker-related siblings like getTickers, subscribeSpreadTickers, or getSpreadTickers. The usage context is only implied by the word 'subscribe'.

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