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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds useful content-level disclosure (which tokens, that values are denominated in dollars), but says nothing about what happens for absent tokens, whether balances are live vs cached, or the return shape in the absence of an output schema.

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?

A single short sentence with zero waste, front-loading the token coverage and ending with the dollar-value behavior. It is a verbless fragment, which slightly weakens structure but not conciseness.

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 explaining the return content, and it does list the tokens and dollar values. However, it omits whether zero balances are returned, whether other tokens can appear, and any freshness/chain caveats, leaving the response shape only partially characterized.

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% and the single wallet parameter is fully documented with a pattern and meaning, so the baseline is 3. The description adds no format or constraint detail beyond what the schema already provides.

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 exact resource (token balances for a wallet), the chain (Base), and the specific tokens covered (ETH, USDC, WETH, AERO, BNKR) plus dollar valuation, which implicitly separates it from generic position tools. It never states the verb explicitly or names get_wallet_positions/get_defi_positions as the alternative, so an agent must infer the boundary.

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 when-to-use, when-not-to-use, or alternative routing guidance, despite three sibling position/balance readers (get_wallet_positions, get_defi_positions, get_old_vault_positions) that could plausibly be confused with it. The token list hints at scope but does not tell the agent which tool to pick.

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