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

Because there is no output schema, the description's disclosure of the returned fields (action, confidence, price_usd, model reasoning) is genuinely load-bearing context. The "read-only, no side effects" clause duplicates what readOnlyHint/destructiveHint already declare, and it says nothing about signal freshness or refresh cadence, so it falls short of a 5.

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 tight sentences, safety and payload front-loaded before the alternative-tool routing. Minor waste in that "read-only operation — no side effects" and "no parameters" restate what annotations and the empty schema already establish.

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 zero-parameter read, the description covers scope, payload, and routing, which is close to complete. The one gap for a trading tool is timing — no indication of how current the signal is or how often it updates, leaving the agent unable to judge staleness.

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?

Zero parameters, so the baseline is 4 and the description's "no parameters" clause is consistent with the empty schema. There is no parameter meaning to add, and none is missing.

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 ("Returns ... trading-agent signals") plus the exact asset coverage (ETH, ONDO, KAITO, DEGEN) and the payload fields (action, confidence, price_usd, reasoning). An agent can distinguish this from get_market_stats or get_whale_flow without opening any schema.

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?

Gives an explicit selection rule — "when you need a directional call rather than raw market data" — and names two alternatives (get_whale_flow, get_arbitrage_opportunities) with the condition that selects each. When-to-use, when-not-to-use, and alternatives are all present.

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