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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds venue sourcing and a meaningful operational trait: the x402 payment cost of $0.003 USDC on Base. Auth, return, and pagination details are still absent, but the added cost disclosure is valuable.

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 sentences with the core capability front-loaded and no wasted wording. The payment sentence is terse and useful, though 'Price' is slightly ambiguous because it could be read as the token price rather than the tool's cost.

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 simple one-parameter tool with annotations and no output schema, the description covers the returned data and cost. However, it leaves the required token address format implicit and does not describe the return shape, which are meaningful gaps for an agent trying to invoke it correctly.

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 0%, and the single token parameter has only a regex pattern, no textual description. The description says 'any Base token' but does not clarify that the input must be a 0x contract address or explain the required parameter, so it fails to compensate for the low schema coverage.

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 specific data provided (live USD price and liquidity) and the sources (Uniswap v2/v3 and Aerodrome pools), identifying the resource as any Base token. It does not explicitly differentiate itself from siblings like base_token or base_portfolio, so it is clear but not sibling-routing precise.

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 explicit when-to-use, when-not-to-use, or alternative tool guidance is given. The phrase 'any Base token' implies context, but the agent must infer when to choose this over base_token, base_token_risk, or base_portfolio.

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