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

With no annotations, the description fully carries the burden. It details what the manifest contains (method, detection process, price ladder, inventory), discloses that inventory is thin and events are reconstructed with zero confirmed live outcomes, and states there is no free data tier. This is highly transparent.

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 front-loads key information with a clear summary. It is mostly concise but includes some redundancy (two sentences confirming no free data tier). Still effective and well-structured.

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 manifest tool with no parameters and no output schema, the description covers the essential context: what it is, its contents, inventory status, and its relationship to paid tools. It does not explain return format but that is acceptable for a descriptive tool.

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?

There are zero parameters, so baseline is 4. The description does not need to add parameter information since none exist. It appropriately focuses on the tool's content.

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 clearly states this tool is a FREE service manifest covering method, latency tiers, prices, and inventory. It explicitly says 'Read this before calling any paid sygnl47_* tool,' differentiating its role from sibling tools and establishing it as a prerequisite.

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 advises reading this before using paid sygnl47_* tools and clarifies it is free, providing clear context. It does not explicitly state when not to use it, but implies that for event data one should use other tools, as this contains no event data.

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