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

With no annotations provided, the description carries the full burden of behavioral disclosure, and it reveals nothing: no mention of chain requirements, whether the address is the token contract, output units, or side effects. The tool name implies a read-only query, but the description itself is empty of behavioral detail.

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?

The description is extremely short, but this is under-specification rather than conciseness. Its single sentence is redundant with the tool name and provides no useful structure or front-loaded information.

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 blockchain token tool with three parameters and no output schema or annotations, the description is severely incomplete. An agent cannot determine what values are valid for chain, how token or address should be formatted, or what the total supply result represents.

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 the baseline is 3. The parameter descriptions ('Chain to process', 'Token to process', 'Address to process') are generic and do not clarify formats or relationships, but the schema does at least name all three parameters.

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 is a tautology: 'Token Total Supply: Token Total Supply' merely restates the tool name and adds no verb, resource, or differentiating detail. It does not help an agent understand what operation is performed or how it differs from related token tools.

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?

No guidance is provided about when to use this tool versus alternatives such as x402-token-symbol or x402-token-decimals. The description offers no context, prerequisites, or conditions for selection.

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