get_buy_price

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered without help. The description adds nothing beyond 'latest'—no data source, staleness, refresh cadence, or rate-limit context—leaving the behavioral picture thin for a live-market lookup.

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?

Purpose is front-loaded in the first sentence, followed by a compact Args block. No filler; each line serves the parameter documentation.

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?

An output schema exists, so return values need not be described, and the two parameters are documented. The main gap is routing: with four closely related price siblings, the definition never says how this differs or when to prefer it.

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%, so the description must carry parameter meaning, and it does provide example values ('BTC', 'USDT') and marks markettype optional. That is a modest but real addition over the bare schema, though format constraints or fallback behavior for an omitted markettype are not explained.

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 the latest buy price for a coin'), which is enough to distinguish it from get_sell_price. However, it does not differentiate itself from the very similar siblings get_latest_coin_price or get_latest_prices, leaving the agent to guess which price endpoint to pick.

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 when-to-use guidance, no mention of alternatives, and no exclusions. With siblings like get_latest_coin_price and get_latest_prices, the agent gets no signal on which tool is appropriate for a given request.

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