subscribe_price_updates

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

With no annotations provided, the description carries the full burden of explaining behavioral details. It only states 'Subscribe' but does not disclose side effects (e.g., persistent subscription, potential costs), authentication requirements, or what the response contains. This is insufficient for a mutation-like operation.

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 a single, front-loaded sentence that directly conveys the tool's purpose without any unnecessary words. Every word contributes meaning, making it highly concise and structured.

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 tool is a subscription operation with no annotations or output schema, and the description fails to address the subscription lifecycle, how updates are delivered, or how to manage/cancel the subscription. This is a significant gap for an agent to invoke and handle the tool correctly.

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 description mentions 'in a specified currency', which adds meaning to the 'currency' parameter by specifying it is the target currency for the price updates. However, schema coverage is 0%, and the description does not detail allowed values, default behavior, or formatting, leaving the agent partially informed.

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 subscribes to real-time Bitcoin price updates in a specified currency, with a specific verb and resource. It distinguishes from siblings like get_realtime_price (fetch current price) and get_price_history (historical data) by emphasizing 'subscribe' and 'real-time'.

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 provides no explicit when-to-use guidance or mention of alternatives. It does not clarify when to choose this over get_realtime_price or how it relates to webhooks or other subscription tools. The context is minimal and implied only 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.