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

It discloses important behavior beyond annotations: $0.01 per call, USDC on Solana, and the MCP x402 challenge-retry flow. This explains why readOnlyHint is false despite the HTTP GET equivalence, though it omits whether subsequent retries recharge and does not cover return behavior.

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?

The description is front-loaded with purpose, followed by payment mechanics and an HTTP equivalent. Every sentence carries operational value, and there is no redundant or filler text.

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?

It covers the unusual payment flow and invocation path thoroughly for a two-parameter tool, and annotations supply read/write and openness hints. However, with no output schema, it does not describe what a ranked spike list contains beyond the phrase 'ranked'.

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%, so both parameters are fully documented in the schema with ranges and defaults. The description adds no parameter meaning beyond what the schema already provides, which is acceptable at baseline.

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 identifies a specific resource and action: ERCOT hub-spread congestion spikes, ranked. It is distinct from siblings like power_flags_battery or power_flags_negative, but does not use an explicit retrieval verb or call out the sibling boundary.

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 explains how to invoke the paid tool via x402, but it never states when to use this tool versus alternatives such as power_scan or the other power_flags tools. There are no exclusions or routing cues.

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