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

With no annotations, the description carries the behavioral burden and does so well: it discloses the free-tier rate limit, the paid x402 path, and the 'facts and flags only, never advice' framing. It also clarifies the quote is live route-based rather than a theoretical estimate. Missing auth setup detail for x402 and any latency behavior keeps it from 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 tight sentences with the core value proposition front-loaded and access terms after. The pricing clause is dense but operationally useful; no filler sentences.

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?

No output schema exists, so the description should characterize the return. 'Facts and flags only' plus 'live route, not theoretical slippage' hints at a cost/route breakdown, and rate-limit and pricing terms are covered. A little more on the returned fields would make it complete for a tool with no annotations or output schema.

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%, with both 'mint' and 'size' fully documented, so the baseline is 3. The description reinforces that the quote is specific to the caller's size, but adds no syntax or format 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?

States a specific outcome — the real cost of exiting a Solana position at a given size — using a live route rather than theoretical slippage. This clearly distinguishes it from siblings like chain, pool, and safety. It doesn't explicitly name a competing tool, so it stops short of a 5.

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?

The description gives pricing and rate-limit mechanics ('3 calls per hour per IP', '$0.030 per call over x402') but no when-to-use or when-not-to-use guidance. There is no mention of an alternative tool or the condition under which an agent should prefer this one, leaving usage to inference.

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