get_realtime_price

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

No annotations exist, so the description carries the full burden; it implies a side-effect-free read and signals the value is live rather than cached, which is useful. However, it says nothing about refresh/caching behavior, rate limits, or whether the quote is a snapshot at call time — meaningful gaps for a 'real-time' tool with zero annotation coverage.

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?

One short sentence with the resource and scope front-loaded and zero filler. Nothing is redundant or buried.

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 one-parameter read tool with no output schema and no annotations, this is close to sufficient: an agent knows what it returns conceptually (a price in a currency). The remaining shortfall is that with no output schema, the description could have sketched the return shape or pointed to get_supported_currencies for valid inputs.

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 coverage is 100% and the single parameter already documents its default of USD, so the schema does the work. The phrase 'in a specified currency' adds nothing beyond it — no guidance on supported currency codes (get_supported_currencies exists as a sibling) or fallback behavior for unsupported values.

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?

States a specific verb and resource (get current real-time Bitcoin price) plus the scoping parameter (currency). It is clearly distinguishable from data-shaped siblings like get_price_history, but it never names the nearby alternatives (get_price_history, subscribe_price_updates, convert_currency) that an agent would actually have to choose between.

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?

'Current real-time' implies this is the point-in-time lookup versus a historical or streaming source, but that contrast is left implicit. There is no explicit when-to-use/when-not clause and no mention of subscribe_price_updates for continuous prices or get_price_history for past values.

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