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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is fully covered structurally. The description's only added behavioral fact is the cost signal '(0.3 points per call)', which is genuinely useful but leaves return shape and any rate/scope constraints unstated.

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?

Two compact clauses, front-loaded with the resource and the indicator categories, with the pricing note appended rather than buried. Nothing is wasted, though the parenthetical could carry more substantive detail.

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?

With no output schema, the description is the only source for what comes back, and it says only 'trend, momentum, levels' without naming indicators, units, or response structure. For a simple two-parameter read tool this is defensible but leaves real gaps.

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 50%: symbol is documented as 'Coin (BTC) or pair id', and the description echoes that with 'coin or pair'. The timeframe parameter is only an enum with no description in either place, and no default or resolution semantics are given, so the description does not compensate for the gap. Baseline 3 for partial coverage.

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+resource: an indicator snapshot covering trend, momentum and levels for a coin or pair. That distinguishes it reasonably from siblings like get_crypto_quotes and get_crypto_candles, though it never names those alternatives explicitly.

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 prerequisites, and no mention of when an agent should prefer this over get_crypto_quotes, get_crypto_candles or a live analysis tool. The reader must infer the context entirely.

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