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

Annotations already declare read-only, open-world, non-idempotent, non-destructive, so the safety profile is covered; the description correctly frames the swap capability as simulation rather than execution, which is consistent. It adds real value by disclosing statelessness, the fixed $0.15 USDC cost, and the sequential multi-stage nature, but says nothing about latency, per-stage failure behavior, or whether the fee is charged on failure. The 'executor' name versus simulation-only behavior is a naming tension the description resolves, not a contradiction.

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?

One front-loaded sentence covering the capability, the stages, and the price, with no filler or repetition. It loses a point for dense unglossed acronyms ('ADK') and marketing framing ('Autonomous', 'Agent') that consume space without informing invocation.

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?

An output schema exists, so return values need no explanation, and there is only one input. But for a multi-stage agent that audits, discovers, and simulates, the definition leaves the agent guessing about stage ordering effects, partial results, and what the goal string must contain to reach a given stage — gaps that matter more here than for a single-purpose 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 with 100% schema description coverage ('Natural-language DeFi due-diligence or swap simulation objective, 1-2000 chars'), so the schema already carries the semantics. The description adds no guidance on how to phrase the goal, what sub-tasks it must mention to trigger the audits versus the simulation path, or whether all three stages always run. Baseline 3 is appropriate when the schema does the work.

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 names a concrete composite capability: OFAC wallet/contract audits, Aerodrome yield discovery, and swap route simulation, so an agent knows roughly what comes back. It stops short of distinguishing itself from siblings that do overlapping work (get_aerodrome_yields, aerodrome_quote_simulator), and 'stateless sequential ADK pipeline' is unexplained jargon that adds no discriminating power.

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 explicit when-to-use or when-not-to-use statement, and no sibling is named as an alternative even though several siblings cover the same sub-tasks. The '$0.15 USDC' price is a useful selection signal (prefer cheaper single-purpose tools for narrow tasks), but the agent must infer that tradeoff itself.

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