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

Annotations already declare readOnlyHint, openWorldHint and idempotentHint=false, so the safety profile is covered; the description adds genuinely non-structured context: result ordering (newest first), the fields carried per incident, and a concrete cost model ($0.005 per call, paid via x402 in USDC on Base or Arbitrum One). The payment requirement is exactly the kind of behavioral detail an agent cannot infer from annotations. It stops short of describing pagination/truncation behavior beyond what the schema says.

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?

Front-loaded with the core action and the definition of an incident, then filters, then cost. Dense but every clause is load-bearing, with only the 'not financial advice' disclaimer being marginal filler. No structural confusion.

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, the description compensates by stating the return shape ('with its type, status and block window') and ordering, and it discloses the paid-x402 access model. For a two-parameter read tool this is close to complete; only explicit sibling differentiation and limit/pagination behavior are missing.

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 the description's 'type=integrity (default), operational (collector errors) or all' essentially restates the enum plus one gloss ('collector errors'). It says nothing about `limit` beyond what the schema already documents. Baseline 3 is appropriate when the schema does the heavy lifting.

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 opens with a specific verb and resource ('Monitor all of Robinhood's stock tokens... integrity incidents, newest first') and explicitly defines what an incident is (supply/treasury divergence from the mint/burn ledger, or a ledger rebaseline). That is far beyond a restatement of the name. It does not explicitly say how it differs from siblings like token_events or token_snapshot, so it falls 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?

Usage is implied by 'Monitor all ... in one call' and the type filter (integrity default, operational for collector errors, all), which tells the agent which variant to pick. However, there is no explicit statement of when to use this instead of token_events/token_snapshot or what the prerequisite payment flow implies for calling order. Adequate but with clear gaps.

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