get_latest_coin_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. The description adds one useful behavioral detail — the default market is AUD when markettype is omitted — but says nothing about data freshness, source, or rate behavior for a live-price tool.

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?

Front-loaded purpose sentence followed by a compact Args block; every line earns its place. The docstring-style Args formatting is slightly redundant with the schema but not wasteful.

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 no explanation, and annotations cover safety. The gap is routing: with many sibling price tools, the description omits the differentiation an agent needs to pick this one correctly. Note the description states markettype defaults to AUD while the schema declares a null default.

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 0%, so the description must carry the burden, and it does document both parameters: cointype with ticker examples (BTC, ETH, DOGE) and markettype as optional with a default. It stops short of format constraints or accepted value lists, but the semantics are largely conveyed.

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 latest prices for a coin') with an optional market qualifier, so the core action is clear. However, it never distinguishes itself from the close sibling 'get_latest_prices' (plural) or the buy/sell price tools, leaving ambiguity about which is appropriate.

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?

No guidance on when to use this tool versus get_latest_prices, get_buy_price, or get_sell_price. The reader must infer usage from the name alone; no conditions or exclusions are given.

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