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

With no annotations, the description carries the full burden. It usefully discloses the pay-per-call cost ($0.002 USDC), which an agent needs for budgeting, but says nothing about return shape, pagination, failure modes, or whether stablecoin balances are limited to specific tokens.

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?

Front-loaded with the payoff (what balances, for what input) followed by routing and pricing. Efficient overall, though the three literal endpoint paths consume space without helping tool selection.

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 two-parameter read tool this covers the essentials of input and cost, but with no annotations and no output schema it omits what the response contains (token list, decimals, zero balances) and how errors surface.

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%, so both parameters are already documented in the schema with format hints (base58 vs 0x). The description adds margin by mapping each chain value to a path, but that is routing detail rather than added parameter meaning, so the baseline 3 holds.

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 resource and scope: native plus stablecoin balances for an address on a chosen chain. It is clear what the tool returns, though it does not explicitly distinguish itself from siblings like 'account' or 'solana_account', leaving some overlap to inference.

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 guidance, no exclusions, and no comparison to the closely named alternatives (account, solana_account, token). The listed endpoint paths are implementation detail, not selection guidance.

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