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

With no annotations, the description carries the full burden and does well: it discloses the $0.02 USDC-on-Base cost via x402 in-band payment, the source labeling ('ok/unavailable'), and the no-stale-fill guarantee. It omits rate limits and failure modes, keeping it short of 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?

Front-loaded with the resource scope and coverage, followed by source-integrity and payment notes. It is dense but every clause carries information; the trailing URL is minor redundancy with the payment context.

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 single-optional-parameter, read-only feed with no output schema, the description covers what is returned, how sources are labeled, the time window, and the payment mechanism. An agent has enough to call it correctly, with only return-shape details left implicit.

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 coverage is 100% and the single optional 'pass' parameter is fully explained in the schema as a day-pass token that skips per-call payment. The description's payment text corroborates this but adds no syntax or edge-case detail beyond the schema.

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: CFTC and SEC crypto/digital-asset rulemaking from the last 90 days, enumerating document types (ANPRM/NPRM/final/notice) and included metadata (RIN, comment deadline, stage-change flag, Unified Agenda presence). This clearly separates it from siblings like get_rwa_feed or get_gov_contracts.

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 90-day window and the 'no stale fill' behavior imply when the tool applies, and the payment line tells the agent how to invoke it. However, there is no explicit guidance on when to choose this over sibling feeds such as get_gov_contracts or get_rwa_feed, and no stated exclusions.

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