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

With no annotations, the description carries the full burden and does disclose important behavior: it is live, computed, and costs 0.05 via x402 on Base. However, it does not clarify whether this is a read-only operation, whether credits are consumed per call, or what side effects or response behavior to expect.

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 a single dense, mildly disorganized sentence. It front-loads the core purpose but mixes computation details, pricing, and a likely typo ('plai Price') into one run-on clause. It is not egregiously long, but structure and polish are below par.

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?

Given the medium complexity, the absence of an output schema, and a large sibling family, the description leaves important gaps: it never lists the 11 series, defines what the computed signal looks like, or states exactly how the 0.05 fee interacts with the optional wallet and free credits.

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% for the only parameter, wallet, and the description also mentions the free credit tiers. The main text adds payment context but does not materially deepen the meaning of the wallet parameter beyond what the schema already says.

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 clear action ('get live computed signal') and gives concrete detail about what the signal is made of: 11 series, 30-period percentile rank, 4-period momentum, and cross-sectional ranking. It lacks sibling differentiation, so it does not fully distinguish processed_stock_quote from the many other processed_* and signal_* tools.

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 guidance on when to use this tool versus alternatives such as signal_stock_report, processed_us_stock_tech, or processed_us_stock_short. The payment/free-tier note is operational context, not usage routing.

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