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

No annotations exist, so the description carries the full burden and it delivers: it labels the call 'lightweight', implies read-only via 'Get', and discloses a per-call cost of $0.001 USDC, which is the kind of behavioral detail an agent needs for budgeting. It omits rate limits and error behavior, keeping it short of a 5.

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 compact sentences: first what it returns, then when to use it plus cost. Nothing is redundant and the highest-value information is front-loaded.

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 and no annotations, the description usefully enumerates the returned fields and the price, which is enough for an agent to decide and call. It could go further on return value formats (e.g., whether image is a URL) and failure modes, but it is adequate for a one-parameter read tool.

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 a single parameter (mintAddress) and schema coverage is 100%, with the schema already stating 'Solana token mint address (base58)'. The description adds no syntax, format, or validation detail beyond that, so the schema does all the work — baseline 3.

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?

Opens with a specific verb+resource ('Get token metadata') and enumerates the exact fields returned (name, symbol, decimals, supply, authorities, mutability, image), which implicitly separates it from token_price/token_holders/token_security siblings. It never names those siblings explicitly, so differentiation relies on inference from the field list.

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?

'Lightweight call — use before any new token interaction' gives a clear trigger condition for when to reach for this tool. It stops short of naming alternatives or stating when-not-to-use (e.g., if you only need price, use token_price), so it is strong context without exclusions.

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