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

Annotations already declare the safety profile (readOnly, idempotent, openWorld, non-destructive), so the bar is lower. The description still adds value beyond them by disclosing the freshness/rate-limit constraint ('Read once a minute') and the temporal shape of the data ('change over the last hour and day').

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 with no filler, and the coverage list is front-loaded. The enumeration is long but each item earns its place by defining scope; nothing is redundant.

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 carries the burden of describing returns, and it does so adequately by naming the assets and the two change windows (hour/day). Cadence is covered. Only minor gaps remain, such as the exact response shape or units.

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?

The tool takes zero parameters, so there is nothing for the description to clarify and the baseline of 4 applies. Schema coverage is trivially 100%.

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?

The description precisely enumerates the asset classes covered (crypto, indices, rates, commodities, FX), which unambiguously identifies the resource and clearly separates it from siblings analyze_wallet and get_venue_rates. It leans on the name for the verb 'get', but the coverage list leaves no doubt about what data comes back.

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 phrase 'Read once a minute' gives a concrete polling cadence, which is a usable operational guideline. However, there is no explicit guidance on when to prefer this tool over siblings or what it explicitly does not cover; usage is only implied.

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