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 does contribute real value: it discloses the $0.005 USDC per-call cost and enumerates what each mode returns. However, it says nothing about how payment is authorized, whether the call is read-only/safe, rate limits, or what happens if 'transaction' is absent in analyze mode.

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?

Three tightly packed sentences, front-loaded with the core action, then per-mode returns, then cost. Every sentence carries information an agent needs, with no filler.

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 does the necessary work by listing the return contents for both modes and disclosing pricing. The remaining gap is payment/auth mechanics and the failure mode when 'transaction' is omitted, which an agent would need before calling blind.

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% and both parameters already document their roles, so the description adds little beyond restating mode semantics. It provides no signature format hints or guidance on the default mode behavior beyond what the schema's default value already shows.

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 verb+resource ('Detect MEV activity on Solana') and then splits that resource into two concrete modes with distinct outputs, which lets an agent distinguish it from the generic transaction_parse or priority_fee siblings. It stops short of naming an explicit alternative, so it is clear but not sibling-differentiated by reference.

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 mode breakdown effectively encodes when to use which path: 'landscape' for a general MEV overview, 'analyze' for a specific transaction. It does not state explicit exclusions or point to any alternative tool when a user wants raw transaction decoding or fee estimates, which is why this is not a 5.

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