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

With no annotations, the description carries the full behavioral burden, and it does disclose the shape of the answer including the LOW/MEDIUM/HIGH risk scale. It says nothing about refresh cadence, data source freshness, latency, or what happens for an asset with no scheduled unlock, which matters for an event-driven feed.

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 sentences, zero filler, with the resource stated first and the returned fields second. The price prefix is compact and informative rather than padding.

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, describing the return fields is exactly the right compensation. The remaining gap is the look-ahead horizon for 'upcoming' events, which an agent would need in order to interpret results.

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 'coin' parameter already carries its enum of six symbols and a default of BTC, so the baseline of 3 applies. The description's phrase 'major crypto assets' loosely corroborates the enum but adds no new meaning about the parameter.

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 pair ('Upcoming token unlock events for major crypto assets') and even enumerates the return fields (unlock date, amount, % of circulating supply, sell pressure risk). That is enough for an agent to know exactly what this returns; the only shortfall against a 5 is that it never contrasts itself with any sibling or scopes what 'major' means beyond the schema enum.

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?

The word 'Upcoming' is the only usage cue, and it leaves the important question open: how far ahead does 'upcoming' look? There is no statement of when to reach for this tool versus related risk signals (e.g. liquidation_pressure, crowded_trade_detector), no prerequisites, and no exclusions.

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