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

No annotations exist, so the description carries the full burden, and it does disclose two costly-to-miss behaviors: it does not submit anything, and it costs $0.10 USDC on Base via x402. That payment and no-side-effect disclosure is exactly the kind of context annotations would normally supply. It does not say what happens if authorization is missing or false, which keeps it from 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?

Three short sentences, no filler, and the core action is front-loaded before the no-submit caveat and the price. Every sentence carries information the agent needs.

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?

There is no output schema and no annotations, and the description does not describe what the returned 'steps' look like or how the x402 payment is settled. The scope, cost, and non-submission behavior are covered, which is the minimum for a paid tool with an undocumented enum parameter.

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 67%, and the one parameter that would benefit from explanation, the 'provider' enum (truecaller/hiya/robokiller/whitepages), is undocumented in both the schema and the description. The description never mentions provider selection, defaults, or whether all four are consulted. It only echoes the authorization framing already present in 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 names a specific verb and resource: preparing official caller-ID unlisting and spam-label dispute steps for a phone number. That distinguishes it from siblings like data-removal or breach-check, which cover different resources. It stops short of explicitly naming an alternative, so it is clear but not fully differentiated.

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 states the precondition 'for an authorized phone number' and the exclusion 'Does not submit requests', which tells the agent this tool plans rather than executes. However, it never names an alternative tool for actually filing the requests or explains when a caller should skip this, so the routing guidance is only implied.

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