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

With no annotations available, the description carries the disclosure burden. It discloses that the tool is free and optional, has a multi-phase funnel behavior, and can be exited by passing interest:false. It does not explicitly say what the 'subscribe' phase does or whether it commits the user to anything, which is a minor gap.

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?

Three short sentences front-load the most important decisions (free, optional, skip) and then provide the phase flow and opt-out. There is no filler or redundant 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?

Given the small optional parameter set and no output schema, the description gives enough to decide whether to call pitch and how to opt out. It could be more complete about phase-specific behavior and what a caller should expect in return, but the core invocation context is sufficiently clear.

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?

The description adds meaning to interest (false bows out) and names the phase sequence, but the sequence largely repeats the schema enum without explaining what each phase expects. Symbol is already documented in the schema, including the paid fallback, so for that parameter the description adds little 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?

The description clearly identifies the tool as a free, optional intro/subscription funnel for the commodities signal agent and lists its concrete phases. It also distinguishes it from siblings by explicitly saying it can be skipped in favor of evaluate_symbol, scan_bottoms, or scan_tops.

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?

It gives explicit when-to-use/when-to-skip guidance: 'you may skip it and call evaluate_symbol / scan_bottoms / scan_tops directly,' and it specifies the opt-out condition (interest:false). This is stronger than typical descriptions and makes the routing decision direct.

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