summary

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 covered structurally. The description adds almost nothing beyond the return-content sketch: no note on whether figures are converted to the requested currency, whether they are cached/stale, or how missing prices are handled — meaningful for a net-worth figure derived from balances.

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?

It is short and front-loads net worth, which is the primary output. However, the semicolon-fragment style without a verb or subject makes it read as a keyword dump rather than a coherent statement of behavior.

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 does useful work by enumerating the returned sections (net worth, allocation, cash vs invested), which is the main thing an agent needs. But the currency semantics and any caveats about data freshness or unavailable valuations are absent.

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?

There is one parameter (currency, default CAD) with 0% schema description coverage, and the description never mentions it. With a low-coverage single parameter the description needs to explain what currency does (display conversion? filtering?) and it does not.

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 names the concrete outputs (net worth, allocation by account kind, security type, cash vs invested) which implies an aggregate/portfolio-level tool distinct from the raw-list siblings accounts/holdings/transactions. But it is a noun-phrase fragment with no verb ('returns'/'computes'), so the agent has to infer it is a read-only computation rather than a listing resource.

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 statement of when to call this instead of accounts, holdings, or transactions, nor any precondition (e.g., 'use after balances exist'). The aggregation-vs-detail distinction is left entirely to inference from the sibling names.

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