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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds genuinely useful semantic context — the data is realized (not unrealized) P&L and is bounded by 'tracked history' — but says nothing about latency, rate limits, or how the two granularities are combined in the response.

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 of real content are front-loaded, but the trailing blockchain/address lines duplicate the schema verbatim and add no value an agent doesn't already have. Removing them would lose nothing.

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 not be explained, and read-only safety is covered by annotations. Between the description and schema, granularity, scope of history, and both required inputs are all accounted for; only the choice against sibling analytics tools is left open.

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 description coverage is 100%, so both parameters are already fully documented; the description simply restates them, and its blockchain list is actually less informative than the schema's (it omits the wallet-type detail captured there). Baseline 3 for a schema that does the heavy lifting.

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: realized P&L at daily and monthly granularity for a wallet over its tracked history. That is clearly distinguishable from lookup_wallet or get_wallet_holdings, though no sibling is named 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?

The second sentence gives a use case ('when a wallet made or lost money', 'spotting streaks'), which is implied guidance rather than explicit when-to-use/when-not-to-use. No alternatives such as get_activity_metrics or get_wallet_history are mentioned, so routing depends on inference.

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